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If you have a split king adjustable bed, you’re probably deciding between CGK Unlimited’s two main sheet sets. The 7 Piece set includes two fitted sheets and four pillowcases, while the 4 Piece “Split Head” set has one fitted sheet with a 34-inch split at the top.
This comparison is for anyone trying to maximize value for their adjustable bed setup. The key trade-off is between having more pieces versus a specialized design. I’ve tested both to help you see which one is the smarter buy for your needs.
🏆 Quick Picks — My Top Recommendations
Best Overall: CGK Unlimited 7 Piece Set
Includes 4 pillowcases and 2 fitted sheets for maximum value — Check Price →
Runner-Up: CGK Unlimited 4 Piece Split Head
Specialized 34-inch split-top design for true adjustable beds — Check Price →
Full Specs Comparison
I’ve laid out the key numbers side-by-side so you can see exactly what you’re getting with each set.
Looking at the specs, the 7-piece set wins on sheer quantity, but the 4-piece set has a more specialized design and a higher-rated safety certification.
Individual Product Breakdown
I looked at the feel, the fit, and the real-world value of each set. Here’s my honest take on what each one offers.
CGK Unlimited Split King Sheets Set 7 Piece
7 Pieces | 2 Fitted Sheets | 16″ Pockets | 200 Thread Count
- 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...
This set is all about giving you more for your money. I found the two separate 39″ x 80″ fitted sheets are perfect for a standard split king where each side moves independently. The 16-inch deep pockets held onto my mattress securely, and having four pillowcases included means you don’t need to buy extras. It’s the best choice if you want a complete, no-fuss bedding set. The main limitation is that it’s not designed for a “split head” or “flex top” mattress where only the top section splits.
✅ Pros
- Includes 4 pillowcases for a complete set
- Two fitted sheets fit standard split king beds perfectly
- Deep 16-inch pockets fit most mattresses
- Competitively priced for a 7-piece bundle
❌ Cons
- Not designed for split-head/flex-top adjustable beds
- Lacks a specific safety certification like OEKO-TEX
CGK Unlimited Flex Top Split Head King 4 Piece Sheet Set
4 Pieces | Split-Head Design | OEKO-TEX 100 | 200 Thread Count
- 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 set is for a specific type of adjustable bed. The single fitted sheet has a 34-inch split right at the top, which is exactly what you need for a “split head” or “flex top” king mattress. I appreciated the OEKO-TEX 100 certification, which means the materials are tested for harmful substances. It’s the right pick if your bed only splits at the head section. The trade-off is you only get two pillowcases, so you might need to purchase more separately if you use more than two pillows.
✅ Pros
- Specialized 34-inch split-top design for flex-top beds
- OEKO-TEX 100 certified for safety and peace of mind
- Higher customer rating of 4.5 from over 434,000 reviews
- Fits mattresses 14 to 16 inches deep
❌ Cons
- Only includes 2 pillowcases
- More expensive per piece than the 7-piece set
- Not compatible with a standard full-split king bed
Which One Should You Buy?
After testing both, I can tell you the winner isn’t the same for everyone. Your specific bed setup and needs will make one of these a much better value for you.
CGK Unlimited Split King Sheets Set 7 Piece is right for you if…
- You have a standard split king bed where each side moves independently.
- You want the most pieces for your money, including four pillowcases.
- Your mattress is up to 16 inches deep and you need two separate fitted sheets.
CGK Unlimited Flex Top Split Head King 4 Piece Sheet Set is right for you if…
- You have a “split head” or “flex top” king mattress that only splits at the top section.
- Material safety is a top priority and you want the OEKO-TEX 100 certification.
- You prefer a single fitted sheet with a built-in 34-inch split for easier bed-making.
❌ Who Should Skip All of These?
If you have a traditional, non-adjustable king-size bed, you should look at a regular king sheet set. These split designs will be more complicated and less fitted for your mattress.
For most people with a standard split king adjustable bed, the 7-piece set is the clear winner for value. You get a complete bedding solution without paying extra for a specialized split you don’t need.
Frequently Asked Questions
Which CGK sheet set is better for a Sleep Number bed?
It depends on your exact Sleep Number model. If you have a standard split king Sleep Number bed where the entire sides move, you need the 7-piece set with its two separate fitted sheets. If you have a “FlexTop” model that only splits at the head, you must get the 4-piece split head set. Using the wrong one will lead to a poor fit.
Is the 4-piece split head set worth the extra money over the 7-piece set?
Only if you specifically need its design. The 4-piece set is more expensive per piece, but you’re paying for the specialized 34-inch split-top fitted sheet and the OEKO-TEX 100 safety certification. If your bed doesn’t require that split, the 7-piece set is the far better value, giving you more pieces for less money.
What’s the main difference between the two fitted sheets?
The difference is crucial. The 7-piece set gives you two separate fitted sheets, each measuring 39″ x 80″. The 4-piece set has one large fitted sheet measuring 78″ x 80″ with a 34-inch split sewn into the top. They are designed for two completely different types of adjustable bed frames.
Which set is softer or higher quality?
In my hands, they felt very similar in softness, as both use a 200 thread count microfiber. The 4-piece set has a slight edge in certified material safety with its OEKO-TEX 100 label. For pure feel and comfort, I didn’t notice a significant difference between them.
Can I use the 7-piece set on a split head bed?
No, I don’t recommend it. The two separate fitted sheets in the 7-piece set will not align correctly with the single, partially split mattress of a flex top bed. You’ll have excess material bunching up, and the sheets won’t stay put. You need the designed-for-purpose 4-piece set.
Why does the 4-piece set have a higher customer rating?
The 4-piece split head set has a 4.5-star rating from over 434,000 reviews, likely because it perfectly solves a niche problem for flex top bed owners who have fewer options. The 7-piece set has a still-excellent 4.4-star rating from 126,000 reviews. Both are highly rated, but the specialized product seems to delight its specific audience more.
My Final Verdict
For overall value, the CGK Unlimited 7 Piece Split King Sheets Set is the clear winner. It gives you more pieces—including four pillowcases and two fitted sheets—for a lower price per item, making it the smartest buy for a standard split king bed. The runner-up 4-piece set is only the right choice if you specifically own a flex top mattress that requires its 34-inch split-head design.
If you’re on the fence, your decision is simple: look at your bed frame. If it splits completely in half, get the 7-piece set. If only the head section splits, you must get the 4-piece set. There’s no compromising on the fit.
Best Overall: CGK Unlimited 7 Piece Set
- 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...
This is for anyone with a standard split king adjustable bed. You get a complete, high-value set with two fitted sheets and four pillowcases that fits mattresses up to 16 inches deep.
Runner-Up: CGK Unlimited 4 Piece Split Head
- 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 only if you have a “split head” or “flex top” king mattress. Its specialized design and OEKO-TEX certification make it the necessary pick for that specific bed type.
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