Thoroughly protect the ankles, the "starting point of coldness" in the human body, and keep the heat inside the socks from escaping. Furthermore, the use of 87% cotton and 13% synthetic fibers boasts high heat retention and excellent durability, maintaining its shape even with daily use and providing a comfortable fit. It's truly a new winter standard that allows you to "warm up just by wearing it"! 【"Relax" x "Heat-Generating Warmer Effect" While Sleeping】 Thick pile is concentrated on the ankle area, which is key to cold protection! It wraps around 360 degrees like an ankle warmer, blocking out the cold air. Furthermore, the extra-thick pile functions as a "heat-retaining circle that traps heat," locking in the warmth inside the socks. By gently warming the San Yin Jiao acupoint, it promotes blood circulation, and a natural feeling of warmth spreads from the ankles throughout the body. It is the perfect cold-weather gear for those suffering from cold sensitivity and for sleeping in winter. 【Double Effect of Heat-Generating Material x Skin-Friendly 33MM Long Fiber Cotton (87%)】 The latest "moisture-absorbing heat-generating fiber" absorbs moisture and converts it into heat! It generates natural heat using sweat and moisture, achieving long-lasting warmth. Furthermore, the entire inside is made of fluffy brushed fabric. The fine brushing firmly traps warm air, combining a skin-friendly feel with comfortable warmth. This gives you the feeling of "warmth from the moment you put on the socks," preventing the cold immediately after getting into bed and supporting a good night's sleep. 【High-Quality Finish Pursuing Antibacterial, Cleanliness, and Durability】 Because they are socks you wear every day, we are thoroughly committed to durability. Utilizing the strong abrasion resistance of polyester and the excellent elasticity of acrylic, we prevent shape loss and wrinkles. Furthermore, by applying a special anti-pilling treatment, we suppress pilling and fluffing, and maintain a fluffy feel and antibacterial effect like new even after repeated washing. The toes and heels are reinforced with stitching, making them tear-resistant, and the sock openings are handmade for a safe design. It is truly the definitive version of warm winter goods that can be used cleanly for a long time. 【Perfect for Winter Gifts】 The simple and high-quality design fits both women and men. It's not too tight as room socks, and you can spend your relaxing time warmly while taking measures against the cold at home. It is also perfect as a heartwarming gift for family and friends who suffer from cold sensitivity, and is very well-received for Mother's Day and Christmas gifts. This pair, which gently warms you from your feet, will comfortably change your winter lifestyle.