【5-Layer Construction for Ultimate Comfort】 Surface: "Contact Warmth Q-MAX 0.095" 8mm Long Pile Microfiber "Moisture-Absorbing & Heat-Generating/Heat-Retaining" Acrylate Fiber + TEIJIN Antibacterial & Odor-Resistant Fiber "Heat-Storing & Insulation" Heat-Retaining Fiber "Cold Air Blocking" Aluminum Sheet "Refreshing & Durable" Recycled Peach Fabric (Backing). While you sleep, heat generation, heat retention, and insulation are repeated, keeping you warm even in the cold winter. 【Contact Warmth & Fluffy, Smooth Touch】 Q-max is a value that quantifies the transfer of heat from human skin to an object; the smaller the value, the warmer it feels. This product's fabric has a Q-MAX of 0.095, providing instant warmth and coziness upon contact. With a yarn length of 8mm and excellent density, it's fluffy, soft, and stores a lot of warm air. 【Acrylate Moisture-Absorbing & Heat-Generating Fiber + TEIJIN Antibacterial, Odor-Resistant, and Anti-Dust Mite Fiber】 Absorbs moisture like sweat from the body, generates heat, and warms the body gently. Uses "Teijin Mighty Top ECO" antibacterial, odor-resistant, and anti-dust mite fiber, which inhibits bacterial growth and provides odor-resistant and anti-dust mite effects. Safe for use by small children. 【Heat-Retaining Fiber & Insulation】 Uses heat-retaining fiber to lock in warm air, retain that heat, and gently envelop the body with natural warmth. 【Aluminum Sheet Included - Insulation & Heat Retention】 A newly developed material that prevents the retained heat from escaping and insulates against cold air from the outside. 【Easy to Attach/Detach & Machine Washable】 The four corners of the back have "Reinforced Dobby Elastic Bands," which securely attach to futons or mattresses and prevent slipping even when you toss and turn. Easy to remove and attach. Enjoy comfortable use. We recommend using a laundry net when machine washing. 【Energy-Saving & Economical】 Using the 5-layer construction blanket and pillow pad made of the same material together provides even greater heat retention. Since it doesn't use electricity, there are no electricity costs, allowing you to sleep warmly, save energy, be kind to the planet, and be kind to your wallet.