【Meticulously Crafted 5-Layer Structure】 Outer fabric: "Contact Warmth Q-MAX 0.095" 8mm long-pile microfiber. "Moisture-Absorbing Heat Generation & Heat Retention" Acrylate batting + TEIJIN Antibacterial & Odor-Resistant batting. "Stores Heat & Insulates" Heat-retaining batting. "Blocks Cold Air" Aluminum sheet. "Fresh & Durable" Recycled peach skin lining. As heat generation, insulation, and heat retention are repeated while you sleep, you can maintain warmth even in the cold winter. 【Contact Warmth & Fluffy, Silky Smooth Texture】 Q-max is a numerical value that quantifies the heat transfer from human skin to an object. The lower the value, the warmer it feels. This product's fabric has a Q-MAX of 0.095, providing instant warmth and coziness upon contact. The yarn is 8mm long and densely woven, creating a fluffy, soft texture that traps a large amount of warm air. 【Moisture-Absorbing Heat-Generating Batting with Acrylate + TEIJIN Antibacterial, Odor-Resistant, and Anti-Mite Filling】 It absorbs moisture such as sweat from your body, generates heat, and warms you up. Uses "Teijin Mighty Top ECO" antibacterial, odor-resistant, and anti-mite filling, which suppresses bacterial growth and exhibits antibacterial, odor-resistant, and anti-mite effects. Safe for young children to use. 【Heat-Retaining Batting & Insulation】 Utilizes heat-retaining batting to lock in warm air, retain that heat, and gently envelop your body with natural warmth. 【Aluminum Sheet Included for Insulation & Heat Retention】 A newly developed material that prevents retained heat from escaping and insulates against cold air from the outside. 【Easy to Attach/Detach & Machine Washable】 Features "reinforced dobby elastic bands" on the four corners of the underside, allowing it to be securely fastened to a fitted sheet or mattress, preventing slippage even when tossing and turning. Easy to attach and detach for comfortable use. We recommend using a laundry net when machine washing. 【Energy-Saving & Economical】 Using the same material for a 5-layer structure blanket, duvet, and pillowcase together can provide even higher insulation effects. No electricity is used, so there are no electricity costs, allowing you to sleep warmly. It is energy-saving, environmentally friendly, and kind to your wallet.