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Hotronic's XLP PFI 50 socks are integrated with Hotronic's heating elements allowing for maximum toe warmth and blood circulation. They are a wool blend and use BootDoc's Power Fit Technology to create a relatively gradual pressure distribution to enhance performance as well. These socks function as an additional set of heat socks or as a replacement pair to be used with your Hotronic XLP One battery.

• 1 pair of Classic Heat Socks XLP PFI 50
• Socks Only. Does Not Include Batteries or re-charger
  
• Small: US Men's Size 4-6 shoe, Women's Size 5-7 shoe (EU 35-38)
• Medium: US Men's Size 7-8 shoe, Women's Size 8-9 shoe (EU 39-41)
• Large: US Men's Size 9-10 shoe, Women's Size 10-11 shoe (EU 42-44)
• XL: US Men's Size 11-13 shoes, Women's Size 12-14 shoe (EU 45-48)
• Power Fit Index of 50
• Maintain foot warmth while reducing perspiration
• Must be used with a Hotronic XLP one battery and recharger
• For more information on all Hotronic products, including installation,