A Durable over the calf merino wool sock with heat under the toes. Anatomically designed for maximum comfort, durability and all day heat. Perfect for long winter hunts. 

Features: 

• 50% Merino Wool, 41% Nylon, 8% Polyester, 3% Acrylic, 1% Spandex
• Moisture Wicking
• Odorsheer Anti-odor control 
• Merino Wool Blend Sock Calf Length 
• L/R Design Comfort toe 
• Heavy cushioning in key areas 
• Arch Support 
• Heel and toe reinforcement
• No slip features 
• Heat under toes 
• Comfort Contour Bluetooth Battery 
• Up to 10 hours of heat 
   

Battery features: 

• Powersheer™ Mini B Rechargeable Lithium-Ion 
• Comfort Contour Battery (3.7V 2200mAh)
• Up to 11 Hours of Power Per Charge 
• UL/CE certified Bluetooth enabled
• Battery size: 4in x 1.8in x 0.5in 
• USB Charge Cable included 
• Charge Time 3-4 hours