Stay Warm with Heat-Retaining Sleep Surface Designed with exclusive Warmer Extreme fabric, this mattress retains heat while preventing overheating, ensuring a cozy and comfortable sleep experience during colder nights. Self-Heating Technology for Winter Comfort The Warmer Extreme fabric generates heat, acting like built-in central heating to provide a warm, dry, and odor-free sleep, making it perfect for winter months. Dual Comfort Support System for Superior Sleep Engineered with advanced comfort technology, this mattress offers five times more support and six times more comfort than standard fillings, delivering unmatched pressure relief and body contouring. Handcrafted in the UK & Safety Certified Proudly handmade by skilled artisans, this mattress meets BS7177:2008 Domestic Use fire safety standards and is crafted for quality, durability, and long-lasting comfort. Compact Packaging & Easy Setup Vacuum-packed, rolled, and boxed for effortless transport and handling, this mattress is delivered straight to your door, making it simple to move, unbox, and expand for instant warmth and relaxation. - Starlight Beds Sleep Warmer Premium Hybrid Mattress 20cm Deep Dual Comfort Fillings in White - Size: Double