Anatomically shaped feet for better support; Heating element spreads heat around the toes; A blend of Merino wool and Warm Reflector fibres to keep feet warm; Easy battery attachment with press studs; Shin protectors for better comfort and toe and heel protectors; Micro-ventilated arch for good evacuation of perspiration; Knee height; Composition: 41% Polyamide, 20% Merino Wool, 13% Polypropylene, 13% Acrylic, 11% Polyamide Microfiber, 2% Lycra; Sold without batteries