The Beneunder Skin-Friendly Thermal Knit Beanie is designed with innovative self-heating and thermal-locking technology, combined with skin-friendly yarn to create a lightweight yet warm knit hat. It addresses common issues found in traditional knit beanies, such as pilling, static electricity, itching, and insufficient warmth, offering a comfortable, itch-free, and static-free wearing experience. Suitable for both men and women, this beanie delivers a new level of comfort for the fall and winter seasons. Key Features Dual-Layer Thermal Air Cushion Design: Featuring an advanced mobile thermal-locking chamber technology, this beanie has a plush sandwich structure that effectively traps still air to maintain warmth while regulating the micro-circulation of head temperature. High-Efficiency Insulation: With a thermal retention rate of 40.1%, surpassing the national standard of 33%, and equipped with far-infrared technology that raises the temperature by approximately 3°C. Superior Skin-Friendly Comfort: The interior is lined with a soft knitted jacquard, providing a comfortable fit without any itching sensation. Anti-Static Protection: Rated with A-grade anti-static performance, preventing static build-up during wear and removal, eliminating the worry of "hat hair." Full Face Coverage Design: The widened brim offers full face coverage, enhancing facial shape while protecting ears from the cold. Universal Fit: Soft and stretchy without feeling tight, it fits head circumferences from 55-60cm, with excellent elastic recovery. Product Technology BiowarmTech Dual Thermal Protection: Combines internal heat retention and external cold resistance technologies to offer comprehensive warmth protection. Mobile Thermal-Locking Chamber: Plush and highly insulating with a thermal retention rate of ≥30%, capable of adjusting the temperature according to the hat's internal micro-environment. Anti-Static Technology: Achieves anti-static performance at the 5 level, ensuring a static-free experience during wear. FlexFree High-Elastic Technology: Incorporates high-elastic sports fibers, offering strong stretchability with a blend of yarn that quickly rebounds without deformation. UPF50+ Sun Protection: Effectively blocks harmful rays, protecting the skin from UV damage. Machine Washable: The entire beanie is machine washable, making it easy to care for without losing shape.