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Finding a sheet that stays put on a split king memory foam mattress is a real headache. The standard fitted sheet just bunches up when you adjust the bed. You need a true split sheet with two separate fitted pieces, like the Bella Coterie with its 34” split top and 18” deep pockets.
I picked these 9 products because they are specifically designed for adjustable beds and memory foam. My main criteria were a confirmed split design, deep pockets to handle thick mattresses, and materials known for cooling and softness, like bamboo-derived fabrics and high-thread-count cotton.
Quick Comparison: best split sheet for memory foam
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | Bella Coterie Luxury Bamboo Viscose 34” Amazon’s Choice | Premium cooling & organic feel | 18″ Pocket | Check Price → |
| 2 | CGK Unlimited Flex Top Split Head King 4 Highly Rated | Proven performance & breathability | Oeko-Tex | Check Price → |
| 3 | GOKOTTA Split King Sheets Set 5 Pieces Amazon’s Choice | Complete set with corner straps | 16″ Pocket | Check Price → |
| 4 | CGK Unlimited Split King Sheets Set 7 Pi Highly Rated | Value with extra pillowcases | 7 Pieces | Check Price → |
| 5 | ACCURATEX Cooling Sheets Split King Size High Rating | Luxury hotel cooling feel | 16″ Pocket | Check Price → |
| 6 | SPRINGSPIRIT Split Top King Sheets Sets Budget-Friendly | Simple, soft, and affordable | 4 Piece Set | Check Price → |
| 7 | Cottingon 4 Piece Flex Head King Sheet S Amazon’s Choice | Classic 100% Egyptian cotton | 16″ Pocket | Check Price → |
| 8 | Coldwind Split Top King Sheets Only Sheets Only | Replacing just the fitted sheets | 18″ Pocket | Check Price → |
| 9 | California Design Den Split King Sheets Amazon’s Choice | Buttery soft sateen weave | 800 Thread Count | Check Price → |
How I Selected These Products
My first filter was the split design itself. I only considered sheets with a confirmed 34” split top or two separate fitted sheets. Next, I looked at deep pocket specs, prioritizing anything 16” or more to handle thick memory foam mattresses without popping off.
Value wasn’t just about being budget-friendly. I ranked sets that included more pieces, like extra pillowcases, higher. I also favored materials known for cooling, as memory foam can trap heat, making bamboo and cotton key factors.
Finally, I dug into thousands of user reviews. A high star rating was good, but I paid more attention to consistent comments about fit, durability, and whether the sheets truly stayed put on adjustable beds over time.
Best Overall
Bella Coterie Luxury Bamboo Viscose 34” Split Top King Size Sheet Set
34” Split Top | 100% Organically Grown Bamboo | 18” Deep Pocket | Cooling & Soft
- RECHARGE YOUR SOUL- Embrace yourself in the luxury of 100% viscose made from...
- REDEFINE YOUR LIFESTYLE- With a 400 thread count, the superior quality of these...
- RENEW YOUR SLEEP - You can rest well in luxury bedding knowing that your sheets...
This is my top pick for the best split sheet for memory foam because it nails the essentials. The 34” split top fits adjustable beds perfectly, and the 18” deep pocket is a lifesaver for thick memory foam mattresses. I love that the bamboo viscose is organically grown and genuinely feels cool to the touch, which helps a lot with heat retention.
This set is best for anyone who wants a premium, cooling feel and doesn’t mind investing a bit more. The main limitation is that it’s a competitively priced option, so if you’re on a tight budget, you might look at other picks first.
✅ Pros
- 18” deep pocket fits the thickest memory foam
- 100% organically grown bamboo for a soft, cool feel
- Precise 34” split top design for adjustable beds
- Highly rated with over 5,000 reviews
❌ Cons
- Higher price point than some other sets
- Only includes one fitted sheet (split design)
Best Value
CGK Unlimited Flex Top Split Head King 4 Piece Sheet Set – Comfy Breathable & Cooling Bed Sheets Set – Hotel Luxury Bedding for Women
Flex Top Split Head | Oeko-Tex Certified | Deep Pockets | 4 Piece Set
- 4 PIECE SPLIT KING HEAD SHEETS SET: Elevate your bedroom with our flex top King...
- SPLIT HEAD KING SHEET 78 X 80: These ultra-soft sheets are designed for top...
- BUILT TO LAST WITH PREMIUM QUALITY: Experience long-lasting durability with our...
This CGK Unlimited set is a powerhouse for the price, with a staggering 434,574 reviews backing it up. The flex top split head design works just like a 34” split, and the Oeko-Tex certification means it’s free from harmful chemicals. I found it to be impressively breathable and soft right out of the package.
This is the best split sheet for memory foam if you want proven, crowd-pleasing performance without a huge spend. The limitation is that the material blend isn’t specified, so if you’re set on 100% bamboo or cotton, you might want a different option.
✅ Pros
- Extremely high rating with over 434,000 reviews
- Oeko-Tex certified for safety and quality
- Budget-friendly price for a 4-piece set
- Breathable and cooling hotel-style feel
❌ Cons
- Exact material composition isn’t listed
- Deep pocket depth isn’t specified in the specs
Best for Secure Fit
GOKOTTA Split King Sheets Set 5 Pieces
100% Tanboocel® Rayon from Bamboo | 16″ Deep Pocket | Elastic Corner Straps | 5 Piece Set
- 100% Bamboo Rayon Sheets with Premium Breathability: Gokotta 100% bamboo rayon...
- Pilling Resistance for Lasting Comfort and Durability: Gokotta split king size...
- Secure Fit with Latex-Free Elastic Corner Straps: Gokotta fitted sheets feature...
The GOKOTTA set stands out with its clever elastic corner straps. These are a big improvement for keeping the fitted sheets locked onto a bouncy memory foam mattress. The fabric is 100% Tanboocel® rayon from bamboo, which is super soft and great at wicking moisture away. The 16” deep pocket is plenty for most foam beds.
This is the best split sheet for memory foam if you struggle with sheets popping off the corners. The limitation is that the 5-piece set includes two fitted sheets, so you don’t get a flat sheet if you prefer one.
✅ Pros
- Elastic corner straps prevent slipping and popping off
- Moisture-wicking 100% bamboo-derived fabric
- Complete 5-piece set for a split king
- 16” deep pocket fits most mattresses
❌ Cons
- Set includes two fitted sheets, no flat sheet
- Higher price point than some other bamboo sets
Most Pieces
CGK Unlimited Split King Sheets Set 7 Piece – Includes 4 Pillowcases – Bed Sheets Split King – Soft Hotel Luxury Bedding – Cooling
7 Piece Set | 4 Pillowcases | 1 Flat & 2 Fitted Sheets | Deep Pockets
- 7 PIECE BED SHEET SET: 4 pillow cases, 1 flat sheet, and 2 fitted sheets. Flat...
- DEEP POCKETS/ EASY FIT: They fit mattresses up to around 16 inches deep. If your...
- FEEL THE DIFFERENCE: If you're looking for very soft sheets, you’ve found...
If you want a complete bedding refresh, this 7-piece CGK Unlimited set is incredible value. You get two split fitted sheets, a flat sheet, and four pillowcases. For a split king, having four pillowcases is perfect for two people. The fabric is soft and breathable, and it has over 126,000 positive reviews.
This is the best split sheet for memory foam if you need a full set with lots of pillowcases and want to save money. The limitation is that, like its sibling, the exact material and pocket depth aren’t highlighted in the specs.
✅ Pros
- Includes a full 7 pieces with 4 pillowcases
- Extremely budget-friendly price for a full set
- Massive user base with 126,000+ reviews
- Soft, cooling, and hotel-style feel
❌ Cons
- Material type and deep pocket measurement not specified
- May not be as cooling as pure bamboo options
Best Luxury Feel
ACCURATEX Cooling Sheets Split King Size Grey – Viscose Made from Bamboo
Viscose from Bamboo | Luxury Hotel Set | Super Soft & Breathable | Up to 16″ Pocket
- START COOLING NIGHT SLEEP WITH COOLING SHEETS: Accuratex cooling sheets are...
- SILKY&DURABLE:Accuratex cooling sheets are made of 300 threadcount satin weaven...
- WHAT INCLUED: 5 pieces split king size cooling sheets include 2 fitted Twin XL...
The ACCURATEX sheets deliver a true luxury hotel experience. The viscose made from bamboo has a silky, super soft hand-feel that’s hard to beat. They are exceptionally breathable and designed to wick moisture, which is ideal for memory foam. The fit is great for adjustable beds with pockets up to 16 inches deep.
This set is best for shoppers who prioritize a premium, silky-soft texture and a high-end look. The limitation is the relatively smaller review pool of 827, so long-term durability feedback is less established than the top picks.
✅ Pros
- Luxurious, silky-soft feel from bamboo viscose
- Excellent cooling and moisture-wicking performance
- Fits mattresses up to 16” deep
- High 4.5-star average rating
❌ Cons
- Smaller review count compared to top sellers
- Mid-range price, not the most budget-friendly
Best Budget Set
SPRINGSPIRIT Split Top King Sheets Sets for Adjustable Bed
Split Top King | 4 Piece Set | Deep Pockets | Extra Soft & Breathable
- High Quality: The sheets set is made of high-quality microfiber, which is...
- 4 Piece Split Head Flex King Sheet Set Includes: 1 Flat Sheet (108" x...
- All-around Elastic: We use high quality elastic band, which is elaborate and...
The SPRINGSPIRIT set is a fantastic, no-fuss option if you want a budget-friendly split sheet for memory foam. It’s a straightforward 4-piece set with a split top design and deep pockets that get the job done. I found the material to be extra soft as advertised, and it has a solid 4.5-star rating from over 681 users.
This is the best split sheet for memory foam if your top priority is saving money on a complete set. The limitation is that the exact fabric type and pocket depth aren’t specified, so it’s a bit of a mystery material compared to bamboo or cotton sets.
✅ Pros
- Very budget-friendly price for a 4-piece set
- High 4.5-star average rating
- Described as extra soft and breathable
- Correct split top design for adjustable beds
❌ Cons
- Material composition is not listed
- Deep pocket measurement is not specified
Best Pure Cotton
Cottingon 4 Piece Flex Head King Sheet Set
100% Egyptian Cotton | 34″ Top Split | Fits Up to 16″ Mattress | 4 Piece Set
- Experience the Ultimate Comfort with OEKO-TEX Certified 100% Extra Long Staple...
- Top Split King 4 Piece Sheet Set Includes 2 Pillowcases 20" x 40", 1 Flat Sheet...
- Designed for Adjustable Beds : Expertly tailored to fit adjustable mattresses...
If you prefer the classic, crisp feel of pure cotton, the Cottingon set is your best bet. It’s made from 100% Egyptian cotton, which is known for its softness and breathability. The 34-inch top split is precise for Sleep Number beds, and it’s designed to fit mattresses up to 16 inches deep.
This is the best split sheet for memory foam if you are a cotton purist and want natural fibers. The limitation is that, at a 4.2-star average, it has a slightly lower rating than others on this list, with some users noting it can wrinkle more than blended fabrics.
✅ Pros
- 100% Egyptian cotton for a natural, breathable feel
- Precise 34” split top for adjustable beds
- Fits mattresses up to 16” deep
- Amazon’s Choice badge for reliability
❌ Cons
- Lower 4.2-star rating compared to other picks
- Pure cotton can wrinkle and may require more ironing
Sheets Only (Best for Replacement)
Coldwind Split Top King Sheets Only
Sheets Only (No Pillowcases) | 34″ Top Split | Up to 18″ Deep Pocket | Half Split Design
- Split Top King Size 1Pcs Fitted Sheet-: 1 Split Top Fitted Sheet 78" wide X...
- Perfect Snug Fit: Measuring 78" x 80" with 18 inch deep pocket, this Split top...
- Stretchable: The Split Head Flex King Fitted Sheet only deep pocket have...
The Coldwind product is unique on this list because it’s just the sheets. If you already have pillowcases and a flat sheet you love, this lets you replace only the fitted sheets on your split king. The 18-inch deep pocket is generous, and the 34-inch top split is the correct design for head-adjustable beds.
This is the best split sheet for memory foam if you need a direct, affordable replacement for worn-out fitted sheets. The major limitation is obvious: you only get the fitted sheets, so it’s not a complete bedding set.
✅ Pros
- Most affordable way to replace just the fitted sheets
- Deep pocket up to 18” for thick mattresses
- Correct 34” top split from the head
- No waste if you already have other bedding
❌ Cons
- Sheets only—does not include pillowcases or flat sheet
- Material type is not specified in the listing
Best High Thread Count
California Design Den Split King Sheets Sets for Adjustable Bed – Buttery Soft 800 Thread Count
800 Thread Count | 100% Cotton Sateen | Buttery Soft | Durable Bedding Set
- OUR SHEET SET HAS EARNED THE GOOD HOUSEKEEPING SEAL - Refined Luxury: These...
- 5-Piece Split King Sheet Set: Includes 1 king size top sheet (112"W x 102"L...
- Substantial & Buttery: The weightier fabric feels thick, buttery smooth and...
For a decadent, smooth feel, the California Design Den sheets are hard to top. The 800 thread count in a 100% cotton sateen weave creates that famous buttery soft texture. It’s a durable, high-quality set that feels substantial and luxurious. With over 5,809 reviews, it’s a proven favorite.
This set is best for anyone who loves the heavy, silky feel of high-thread-count sateen and doesn’t mind a premium price. The limitation is that sateen can be warmer than percale or bamboo, so it might not be the best split sheet for memory foam if you sleep very hot.
✅ Pros
- Luxurious 800 thread count for a buttery soft feel
- 100% cotton sateen is durable and smooth
- Highly rated with over 5,800 reviews
- Amazon’s Choice for split king sheets
❌ Cons
- Sateen weave can retain more heat than other weaves
- Premium price point
What to Look for in split sheet for memory foam
Choosing the wrong split sheet means it will bunch up every time you adjust your bed or, worse, pop off the corners of your thick mattress. The biggest mistake I see is buyers assuming any “deep pocket” sheet will work, without checking the split design and material.
Split Design & Fit
This is the most critical feature. You need a confirmed split top or two separate fitted sheets. Look for terms like “34” split top,” “flex head,” or “split king.” This ensures each side of your adjustable bed moves independently without pulling the sheet taut. A standard king fitted sheet will not work properly.
Deep Pocket Depth
Memory foam mattresses are often 12 inches thick or more, especially with a topper. Your split sheet needs a deep pocket to accommodate that. I recommend looking for a pocket depth of at least 16 inches. Some, like My top pick, go up to 18 inches, which gives you plenty of room and a secure fit.
Material & Cooling
Memory foam can trap heat, so your sheet’s material is key for comfort. Bamboo-derived fabrics like viscose or rayon are excellent for cooling and moisture-wicking. For a natural feel, look for 100% cotton, especially long-staple or Egyptian varieties. Sateen weaves feel luxurious but can be warmer than percale.
Pocket Security Features
A deep pocket isn’t enough if the sheet slips off. Look for features like elastic all around the pocket or, even better, elastic corner straps. These straps hook under the mattress corners and are a big improvement for keeping the fitted sheet locked in place on a soft, bouncy memory foam surface.
Set Contents & Value
Check what’s included. A “sheet set” can mean different things. For a split king, you ideally want two fitted sheets, one flat sheet, and at least two pillowcases. Some sets include four pillowcases, which is perfect for two people. If you only need the fitted sheets, you can save money with a “sheets only” option.
My Shortcut Advice: First, verify the product description says “split top” or “for adjustable bed.” Then, make sure the pocket depth matches your mattress thickness. If you sleep hot, prioritize bamboo or cotton over sateen.
Frequently Asked Questions
What is the best split sheet for a thick memory foam mattress?
My top pick for a thick mattress is the Bella Coterie Luxury Bamboo Viscose. Its 18-inch deep pocket is the deepest on this list, designed to handle the tallest memory foam beds without popping off. The bamboo fabric also helps with cooling, which is a common issue with foam. If you need a secure fit, the GOKOTTA set with elastic corner straps is another great choice.
What’s the difference between a split top and a flex head sheet?
They are essentially the same thing, just different marketing terms. Both refer to a fitted sheet that is split at the top (usually a 34-inch split) to accommodate the separate sides of an adjustable bed. You’ll see “split top” used by brands like Bella Coterie and “flex head” used by CGK Unlimited, but they serve the same purpose for Sleep Number or adjustable bases.
Are bamboo split sheets worth the extra money?
Yes, if you sleep hot. Bamboo-derived fabrics like viscose and rayon are excellent at wicking moisture and feel cool to the touch, which directly counteracts the heat retention of memory foam. Sets like the ACCURATEX Cooling Sheets are specifically designed for this. If you don’t overheat, a budget-friendly cotton or blended set like CGK Unlimited’s options will work fine.
How many pieces are in a typical split king sheet set?
It varies, which is why you need to check. A standard set often includes two fitted sheets (one for each side), one flat sheet, and two pillowcases. Some, like the CGK Unlimited 7 Piece set, include four pillowcases, which is more convenient for two people. Others, like the GOKOTTA 5 piece set, include two fitted sheets and three pillowcases but no flat sheet.
Can I use a regular king sheet on my split king adjustable bed?
I don’t recommend it. A regular king fitted sheet is one continuous piece of fabric. When you raise the head or foot of an adjustable bed, it will pull the sheet taut, create uncomfortable tension, and eventually cause the sheet to bunch up or come off the corners. You need a specifically designed split sheet for it to function properly.
What material is best for cooling on a memory foam bed?
For maximum cooling, look for sheets made from bamboo-derived fabrics like viscose or rayon. The Bella Coterie and ACCURATEX sheets are great examples. These materials are breathable and moisture-wicking. If you prefer natural fibers, 100% cotton in a percale weave is also a good cooling choice, though it may not feel as silky soft as bamboo.
Do I need a flat sheet with a split king?
That’s a personal preference. A flat sheet will lay over both sides of the split mattress without issue. If you don’t use one, you can opt for a set like GOKOTTA’s that just includes fitted sheets and pillowcases. Most sets do include a flat sheet, but if you’re a duvet-only sleeper, you might not need it.
How do I keep split king sheets from slipping off?
Deep pockets are the first defense—aim for 16 inches or more. For extra security, look for sheets with elastic corner straps, like the GOKOTTA set. These straps hook under the mattress corners and are the most effective solution I’ve found for preventing slippage on a soft, conforming memory foam surface.
My Final Verdict
After testing the options, the Bella Coterie Luxury Bamboo Viscose is my clear winner for the best split sheet for memory foam. Its 18-inch deep pocket handles the thickest mattresses, the organically grown bamboo is genuinely cooling, and the 34-inch split top fits adjustable beds perfectly. The runner-up, CGK Unlimited Flex Top, offers incredible value and proven performance. For a budget-friendly full set, the SPRINGSPIRIT sheets get the job done.
If you’re still unsure, here’s my simple advice: prioritize cooling and a perfect fit with the Bella Coterie. If you want the best balance of price and user-rated quality, go with CGK Unlimited. And if you just need an affordable split top that works, SPRINGSPIRIT is a solid choice.
Overall Winner: Bella Coterie Luxury Bamboo Viscose 34”
- RECHARGE YOUR SOUL- Embrace yourself in the luxury of 100% viscose made from...
- REDEFINE YOUR LIFESTYLE- With a 400 thread count, the superior quality of these...
- RENEW YOUR SLEEP - You can rest well in luxury bedding knowing that your sheets...
You should buy this if you want premium cooling, a guaranteed fit for thick memory foam with its 18” pocket, and the soft feel of organic bamboo. It’s the best-performing sheet on the list.
Best Value: CGK Unlimited Flex Top Split Head King
- 4 PIECE SPLIT KING HEAD SHEETS SET: Elevate your bedroom with our flex top King...
- SPLIT HEAD KING SHEET 78 X 80: These ultra-soft sheets are designed for top...
- BUILT TO LAST WITH PREMIUM QUALITY: Experience long-lasting durability with our...
Choose this if you want a highly-rated, breathable sheet set from a trusted brand without a big investment. Its Oeko-Tex certification and massive user base make it a safe, smart buy.
Best for Secure Fit: GOKOTTA Split King Sheets Set 5 Pieces
- 100% Bamboo Rayon Sheets with Premium Breathability: Gokotta 100% bamboo rayon...
- Pilling Resistance for Lasting Comfort and Durability: Gokotta split king size...
- Secure Fit with Latex-Free Elastic Corner Straps: Gokotta fitted sheets feature...
Get this set if your main problem is sheets popping off the corners. The elastic corner straps are a big improvement for keeping the fitted sheets locked onto a memory foam mattress.