12 Inch King Size Mattress, Hybrid Zoned Support Pocket Coils & Cooling Memory Foam, Medium-Firm Feel with Strong Edge Support, Pressure Relief, CertiPUR-US Certified
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90-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
13 left in stock
Arrives
Thursday, Mar 19
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Size: King
Style: 12 Inch
Features
- SLEEP YOUR WAY SIDE, BACK, OR STOMACH:OFFTR Z 12 Inch King Size Hybrid Mattress adapts to your sleeping style. The plush comfort layer, combining low-resistance foam and gel memory foam, gently cradles your bodys curves. Beneath, responsive pocket coils provide dynamic support, keeping your spine aligned all night.
- TARGETED SUPPORT WHERE IT MATTERS (ZONE SUPPORT) The Superior Zoned Support System, featuring 8.5 high-compression pocketed coils and reinforced lumbar foam ensure extra support for your lower back and hips. This reduces sinkage, promotes healthy spinal alignment, and helps alleviate back pain so you wake up refreshed and ready to take on the day.
- SOFT YET SUPPORTIVETHE PERFECT FEEL SLEEPERS LOVE:It all starts with the OFFTRZ High-Compression Spring Systemshorter coils for stronger support and a thicker, more contouring comfort layer. The 8.5 high-compression pocketed coils reinforce the edges and isolate movement, ensuring balanced comfort in this hybrid mattress.
- MINIMIZED MOTION, MAXIMIZED SPACE:Say goodbye to sleep disruptions. Responsive coils isolate motion so you and your partner (or pet!) stay undisturbed. Reinforced edges prevent sagging and expand your usable sleep surface stable, quiet, and durable.
- CertiPUR-US Certified:All foams in this firm mattress are CertiPUR-US certified, ensuring durability and safety. We offer a 10-year worry-free warranty. Allow 72 hours for full expansion after unboxing. Unbox with caution as the mattress may expand rapidly. For any assistance, please contact our customer support team.
Brand: OFFTR z
Size: King
Product Dimensions: 80"L x 76"W x 12"Th
Item Weight: 72.3 Pounds
Item Firmness Description: Medium Firm
Top Style: Euro Top
Cover Material: Plush
Number of Layers: 5
Fill Material: Gel Memory Foam, High Density Foam
Weight Limit: 600 Pounds
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 72.3 pounds
Manufacturer: OFFTRZ
Item model number: OFB1
Date First Available: December 26, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Mar 19
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: Queen (U.S. Standard)
Style: 12 Inch
One of the first things I noticed about this mattress is the comfort and overall feel. It strikes a really good balance—not too soft and not too firm—which works well for my sleeping preferences. The support is excellent and helps keep my spine properly aligned, so I wake up without the back pain I used to have. I also appreciate the pressure relief, especially around my shoulders and hips, as the mattress contours nicely to my body. Another big plus is temperature regulation; it doesn’t trap heat, so I stay cool and comfortable throughout the night. Since I share the bed, motion isolation is important, and this mattress does a great job minimizing movement when my partner turns. The edge support is solid too, making it easy to sit or sleep near the edge without feeling like I’ll roll off. Overall, considering the comfort, support, and quality, this mattress offers great value for the price and feels like a worthwhile investment.
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Reviewed in the United States on December 27, 2025 by dwayne johnson
Size: King
Style: 12 Inch
I’ve been using this mattress for a short time now and I’m honestly very happy with it so far. It arrived well packaged and expanded quickly after opening. There was a slight “new mattress” smell at first, but it fully disappeared within a day. The medium-firm feel is exactly as described. It feels supportive without being hard, and it doesn’t sink too much when you lie down. I especially like the edge support — it feels stable when sitting or sleeping near the sides, which was important for me. The hybrid design gives a good balance between cushioning and support, and I don’t feel pressure on my shoulders or lower back. Another big plus is temperature. I tend to sleep warm, and this mattress sleeps noticeably cooler than my previous one. Motion transfer is also minimal, which is great if you share the bed. Overall, for the price, the quality exceeded my expectations. It feels well made, comfortable, and supportive, and I’m getting better sleep already. I would recommend this mattress to anyone looking for a medium-firm hybrid option without spending a fortune.
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Reviewed in the United States on January 8, 2026 by Nil Colakoglu Nil Colakoglu
Size: Queen (U.S. Standard)
Style: 12 Inch
I read countless reviews and kept coming back to this bed. Soft pillow top, yet good support to leave you feeling rested and relaxed. My first bed in a box was an easy task. It expands quickly so make sure you have adequate space and follow the directions. There is a nice little bounce to it, not super dense like some memory foam beds can be. The quality and comfort of this affordable bed feel high end!
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Reviewed in the United States on February 14, 2026 by O
I’m very satisfied with this mattress. It has a thick, cushioned top that feels soft when you first lie down, but it still provides great support throughout the night. It doesn’t sink too much and keeps its shape well, which is perfect for maintaining proper back alignment. The quality is impressive the stitching looks durable and the overall design feels sturdy and premium. I also appreciate that it doesn’t trap too much heat, making sleep more comfortable.
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Reviewed in the United States on January 25, 2026 by Neysy Neydy Neysy Neydy
Size: King
Style: 12 Inch
Very comfy the first week, by the second week I wasn't sleeping quite as good. Could be me. For the price point it's great. It has a decent edge which matters to me. It's light for a long and was easy to set up. I don't consider it too firm, I would say it's medium. If you're wondering if you should get it and your on budget just know it's not going to last as long as a $1200+ mattress but that didn't matter to me. Giving 4 stars because I haven't had it very long and I can't speak to it's longevity.
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Reviewed in the United States on February 12, 2026 by Royal T
Size: King
Style: 12 Inch
I purchased this 12-inch King size mattress and it has exceeded my expectations. The combination of pocket coils and memory foam provides a perfect balance of medium firmness and comfort, offering great support for the back and hips. The edge support is strong, allowing you to sit or sleep near the edge without feeling unstable. The pressure relief is noticeable, making it very comfortable for side and back sleepers. The cooling foam helps regulate temperature throughout the night. It arrived well packaged, expanded properly, and had no strong odor. Overall, this mattress offers excellent quality and comfort for the price, and I highly recommend it.
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Reviewed in the United States on January 11, 2026 by Leodexi Leodexi
Size: King
Style: 12 Inch
Great mattress! I believe this mattress will last for years. As long as you follow the instructions it should inflate and stiffen out to what it should be. My first night sleeping in it I didn’t want to get out of bed because it’s so comfy! No back pain, just great sleep! When it is delivered make sure you have another person to help lift its heavy as hell lol.
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Reviewed in the United States on February 13, 2026 by Olivia
Size: Queen (U.S. Standard)
Style: 12 Inch
It’s a very good quality mattress. It is comfortable, soft, yet strong and firm at the same time. The materials feel durable and well made. Once you open it, the mattress expands quickly. It provides great support and helps improve sleep quality. Overall, I’m very happy with my purchase and would definitely recommend it.
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Reviewed in the United States on January 5, 2026 by Natalie Natalie