HotHands Heated socks help keep your feet warm and comfortable in the outdoors when the temperature drops! Specifically made with special pockets to fit HotHands warmers, this pair of socks is designed for to provide convenient long lasting heat. The ultimate way to stay comfortable outdoors when the weather gets cold! Sock Features Elastic cuff holds in heat Lightweight acrylic-poly blend Integrated pockets for HotHands warmers True toe and heal construction Machine washable Sock Specifications: Color: Gray/Red Weight: 0.44 lbs (199 g) Size: Men: 4½ - 8, Women: 5½ - 10½ Material: 93% Acrylic, 7% Polyester Country of Origin: USA Harmonized Code: 6115.99.9000 ECCN: EAR99 MFG SKU: ?B845Y Care Instructions: Machine wash warm with like colors Non-chlorine bleach (when needed) Tumble try on medium Warmer Features: Ready to use Air activated Safe, natural heat Heats up 15-30 minutes after opening Safe to dispose with regular garbage; ingredients will not harm the environment Warmer Specifications: Duration: Up To 6 Hours (actual duration depends on usage and storage conditions) Weight: 0.123 lbs (56 g) Dimensions: 4.75" x 6.56" (12 cm x 16.7 cm) Average Temperature: 102 °F (39 °C) Maximum Temperature: 127 °F (53 °C) Ingredients: Iron, water, cellulose, activated carbon and salt Country of Origin: USA Harmonized Code: 3005.90.9900 ECCN: EAR99