【Three Heating Modes for Versatile Use】Experience customizable warmth with three distinct heating settings: 35°C for daily life, 45°C for work environments, and 55°C for outdoor activities. 【Premium Cotton for Durability and Comfort】Crafted from high-quality cotton, this product is designed to be exceptionally durable and resistant to wear and tear. The material is less likely to deform or pill over time, extending its lifespan. 【Superior Elasticity for a Secure Fit】Featuring twice the elasticity of standard fabrics, these items provide a snug fit around your feet and ankles. This enhanced flexibility ensures that the product fits securely without restricting movement, making it ideal for active users who require both comfort and performance. 【Waterproof and Washable】Designed with waterproof capabilities, this product can withstand wet conditions and is easy to clean. It can be washed multiple times without compromising its integrity or functionality, ensuring long-term use and hygiene. 【Powerful Dual-Battery System for Extended Wear】Using 3.7V 4000mAh high-capacity power bank, the socks can withstand long working hours without frequent charging Specifications: Type: heated socks Material: Cotton Heating mode: three modes Battery capacity: 4000mAh * 2 (included) Voltage: 3.7V