12 Inch King Size Mattress for...$ 94.64 Price: £324.99 - £249.99(as of Jan 02, 2026 04:35:20 UTC – Details) From the brand Slily Mattress Authentic photography Always photograph mattresses truthfully – what you see is what you get. Deep quilted Deep quilted and comfortable, ideal if you have back problem. Pro-design Aesthetically pleasing, comfortable, and much-loved by clients. OEKO-TEX 100 certified The certified article is harmless to human health. About SLILY SLILY redefining comfort through innovation and superior craftsmanship, we provide families around the world with high quality mattresses at a great price. For a more comfortable, safer and healthier night’s sleep. We provides a 100-night trial and online service for each mattress. Our brand team is dedicated to ensuring your satisfaction, providing personalized support from purchase to post-purchase. ✔️Supportive & Zoned Pocket Sprung：Our 12 inch Slily king size hybrid mattress features 7-zoned pocket sprungs for targeted support, adapting to your body’s contours, while plush memory foam cradles pressure points—shoulders, hips, knees—for cloud-like comfort. It’s firmer where you need it (think lower back) and softer on pressure points like shoulders and hips.✔️Orthopedic & Back Pain Relief：Its firm yet yielding structure cradles your body, easing pressure back pain. It encourages proper posture throughout the night. The supportive core works with your body’s natural curves. Wake refreshed, not achy—orthopedic mattress kingsize is crafted to turn restless nights into restorative sleep.✔️Breathable & Cool：Pocket sprung with an advanced airflow design circulates air freely to keep you fresh all night—no more stickiness. Crafted with breathable, soft fabric, it maintains that just-right feel. We’ve also used fabric with a higher weight than others. A higher GSM mattress fabric offers superior durability, meaning less pilling.✔️Motion Isolation & Edge Support：Each spring works independently，clever design absorbs movement—so a partner’s tossing won’t jolt you awake. Reinforced edges mean you can sit or lie right to the sides without sagging. Sleep soundly, move freely, and make the most of every inch. Ideal for couples or anyone valuing undisturbed, secure comfort.✔️100 Night Trial-5ft 150 x 200cm size：Our mattress is shipped, compressed, vacuum-sealed, and neatly rolled. Please wait for 2-3 days after you open the package and keep the room ventilated. And give your body a week to get used to your new mattress, you’ll love the sleep experience after about a week. Each slily mattress comes with a 100 night trial. If you have any questions, Slily Online Service will assist you within 24 hours. Customers say Customers find the mattress comfortable, with one mentioning it’s firm enough to keep their back properly aligned. Moreover, the mattress helps reduce back and shoulder pain, and customers report sleeping better and waking up refreshed. Additionally, they appreciate its value for money, good support, and thickness, with one customer noting its excellent edge support. They also like its rollability, with one mentioning how well it adapts to movement. AI Generated from the text of customer reviews Related products Shoe Rack with SeatSelect options 12 Inch King Size Mattress for...Select options Sofia “Sofa bed in a box”Add to cart 12 Inch Double Mattresses 4ft6...Select options This product has multiple variants. The options may be chosen on the product page Ottoman Storage ( large )Add to cart