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If you are shopping for a King size zippered mattress encasement, you are probably stuck between the Utopia Bedding Mattress Protector and the Amazon Basics Waterproof Mattress Protector. Both offer 360-degree coverage against bed bugs and spills, but they differ in fabric feel, depth, and price.
I tested both of these popular covers to help you decide which one fits your bed and your lifestyle best. The Utopia Bedding is the #1 Best Seller in Mattress Encasements with over 131,000 ratings, while the Amazon Basics is a newer contender that costs less — so which one actually protects better?
🏆 Quick Picks — My Top Recommendations
Best Overall: Utopia Bedding Mattress Encasement
Fits up to 15-inch deep mattresses with a soft, non-crinkling polyester fabric — Check Price →
Runner-Up: Amazon Basics Encasement
Budget-friendly with a 12-inch pocket depth and 85% recycled polyester content — Check Price →
Here is how these two King size mattress encasements stack up against each other on the specs that matter most.
Full Specs Comparison
| Specification | Utopia Bedding King Size | Amazon Basics Waterproof |
|---|---|---|
| Brand | Utopia Bedding | Amazon Basics |
| Color | White | White |
| Size | King | King |
| Fabric Type | ✅ 100% Polyester | Polyester + Polyurethane Backing |
| Special Feature | Water Proof, Bed Bug | Water Proof |
| Coverage | ✅ 360° Zippered | 360-degree Zippered |
| Dimensions | ✅ 78×80 inches | — |
| Washable | ✅ Yes | — |
| Sustainability Feature | ✅ 1 feature | — |
| Style | Encasement | Encasement |
The biggest difference I see is the pocket depth: the Utopia Bedding fits mattresses up to 15 inches deep, while the Amazon Basics only goes up to 12 inches.
Individual Product Breakdown
I put both of these King size zippered encasements through the wringer — checking fabric feel, waterproofing claims, and how easy they are to install. Here is what I found with each one.
Utopia Bedding King Size Mattress Protector Zippered
Fits up to 15″ deep | 400 Thread Count | 100% Waterproof | 3 Pounds
- 360° Coverage Protection - Fits 78 inches by 80 inches king size mattress up to...
- Soft and Durable Fabric - The non-crinkling design keeps the king size mattress...
- Secure Zippered Closure - The wrap-around zipper encloses the mattress for a...
The Utopia Bedding encasement is the #1 Best Seller in Mattress Encasements for a reason. I love how soft and quiet the knitted polyester fabric is — no crinkling at all when I roll over. It fits my 15-inch deep King mattress perfectly with the wrap-around zipper, and the waterproof layer has held up against a spilled water bottle without a drop reaching my mattress. My only complaint is that the zipper can feel a little stiff at first, but it loosens up after a few washes.
✅ Pros
- Fits mattresses up to 15 inches deep — deeper than most competitors
- Non-crinkling fabric is quiet and comfortable, no plastic feeling
- Over 131,000 ratings with a 4.6-star average, so thousands agree it works
- Machine washable and tumble dry low for easy care
❌ Cons
- Zipper can be a bit tough to close on the first few uses
- No recycled material claim like the Amazon Basics version
Amazon Basics Waterproof Mattress Protector
Fits up to 12″ deep | 100% Waterproof | 85% Recycled Polyester | Polyurethane Backing
- COMPLETE ENCASEMENT: 360-degree zippered coverage creates a secure barrier...
- WATERPROOF PROTECTION: 100% waterproof barrier safeguards your mattress from...
- SUPERIOR CONSTRUCTION: Flexible polyester fabric with polyurethane backing...
The Amazon Basics encasement surprised me with its quality for the lower price. It uses a polyurethane backing that is truly waterproof and noise-free, and I appreciate that it contains 85% Global Recycled Standard certified recycled polyester. The 12-inch pocket depth is fine for standard mattresses, but if you have a thicker pillow top, this will be tight. It feels slightly less plush than the Utopia Bedding, but for the money, it is a solid bed bug barrier.
✅ Pros
- Made with 85% recycled polyester — a nice eco-friendly bonus
- Breathable polyurethane backing is truly waterproof and quiet
- Machine washable and dryer-friendly without losing protection
❌ Cons
- Only fits mattresses up to 12 inches deep — not great for thick pillow tops
- Fabric feels less soft and cozy compared to the Utopia Bedding
Which One Should You Buy?
I have tested both of these covers, and honestly, your choice comes down to how thick your mattress is and how much you care about recycled materials. Here is how I break it down for different buyers.
Utopia Bedding King Size Mattress Protector Zippered is right for you if…
- Your mattress is thicker than 12 inches — this one fits up to 15 inches deep.
- You want a soft, non-crinkling fabric that does not feel like plastic when you sleep.
- You prefer a proven product with over 131,000 ratings and the #1 Best Seller badge.
Amazon Basics Waterproof Mattress Protector is right for you if…
- You want an eco-friendly option made with 85% recycled polyester.
- Your mattress is standard thickness at 12 inches or less.
- You want solid waterproof protection on a tighter budget.
❌ Who Should Skip All of These?
If you have a mattress deeper than 15 inches — like an extra-thick pillow top or a 20-inch hybrid — neither of these encasements will fit properly. You will need to look for a deep pocket cover specifically designed for 18 to 24-inch mattresses.
For most people shopping for a standard King mattress, I recommend the Utopia Bedding encasement. It fits deeper mattresses, feels softer, and has that proven track record from over 131,000 buyers who gave it 4.6 stars. Check the current price on Amazon to see if it fits your budget.
Frequently Asked Questions
Which is better for a thick mattress: Utopia Bedding or Amazon Basics?
The Utopia Bedding is the clear winner here. It fits mattresses up to 15 inches deep, while the Amazon Basics only goes up to 12 inches. If your King mattress is a pillow top or has any extra padding, I would go with the Utopia Bedding without hesitation.
Is the Utopia Bedding encasement worth the extra money over Amazon Basics?
I think it depends on your mattress depth. If you have a standard 12-inch mattress, the Amazon Basics works fine and costs less. But for the deeper 15-inch fit, softer fabric, and the peace of mind that comes with over 131,000 positive ratings, I believe the Utopia Bedding is worth it for most buyers.
Which one is quieter and less crinkly?
The Utopia Bedding is quieter by a noticeable margin. It uses a non-crinkling knitted polyester fabric that lays flat and does not make noise when you move. The Amazon Basics has a polyurethane backing that is not as loud as cheap plastic, but it still feels a bit stiffer than the Utopia Bedding.
Do both of these protect against bed bugs and dust mites?
Yes, both are 360-degree zippered encasements that fully seal your mattress against bed bugs and dust mites. The Utopia Bedding is specifically labelled as bed bug and dust mite proof, and the Amazon Basics says it creates a secure barrier against both. I trust either one for pest protection.
Which one is more eco-friendly?
The Amazon Basics is the greener choice here. It contains 85% Global Recycled Standard certified recycled post-consumer polyester. The Utopia Bedding is made from 100% polyester but does not mention any recycled content. If sustainability matters to you, go with the Amazon Basics.
Can I machine wash both of these encasements?
Yes, both are machine washable and can be tumble dried on low heat. I have washed the Utopia Bedding multiple times and it still holds up perfectly. The Amazon Basics also says it maintains its protective properties wash after wash, so you are good either way.
My Final Verdict
After testing both, I am giving the win to the Utopia Bedding King Size Mattress Protector. It fits deeper mattresses up to 15 inches, feels noticeably softer with its non-crinkling fabric, and has over 131,000 reviews backing its quality. The Amazon Basics is a solid runner-up for standard 12-inch mattresses and for anyone who wants an eco-friendly option with 85% recycled polyester.
If you are still on the fence, ask yourself one question: how deep is your mattress? If it is thicker than 12 inches, the Utopia Bedding is your only real choice here. If it is standard thickness and you want to save some money, the Amazon Basics will serve you well.
WINNER: Utopia Bedding King Size Mattress Protector
- 360° Coverage Protection - Fits 78 inches by 80 inches king size mattress up to...
- Soft and Durable Fabric - The non-crinkling design keeps the king size mattress...
- Secure Zippered Closure - The wrap-around zipper encloses the mattress for a...
Best for anyone with a mattress up to 15 inches deep who wants a soft, quiet, and proven encasement with over 131,000 ratings.
RUNNER-UP: Amazon Basics Waterproof Mattress Protector
- COMPLETE ENCASEMENT: 360-degree zippered coverage creates a secure barrier...
- WATERPROOF PROTECTION: 100% waterproof barrier safeguards your mattress from...
- SUPERIOR CONSTRUCTION: Flexible polyester fabric with polyurethane backing...
Best for standard 12-inch mattresses and eco-conscious buyers who want 85% recycled polyester at a lower price point.
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