Product Details     Style: 01-0100-352 With the Hotronic XLP BT Surround Comfort Heated Ski Socks, you can take your comfort with you even when you’re not riding the lift. Instead of integrating the Hotronic heat technology into your boots, it’s built into these compression-fit merino wool ski socks, meaning you get to enjoy enhanced performance and comfort no matter what boots you’re wearing. So wear them on the slopes, where them at the cross country center, or even where them in the stands at a wintry football game. The 220mAh Li-Ion Battery will deliver plenty of power, and using the Hotronic Heat App you’ll be able to control warmth levels and monitor battery power wirelessly.KEY FEATURES Brings all-around warmth to any footwear, making these great for skiing, snowboarding, snowshoeing, or just being outside in the cold2200mAh Li-Ion Batteries offer a lot of power with less weight and a more compact formatCompression fit improves circulation for improved warmth and recovery, and a fit that stays put in any boot SPECS Sock is 74% nylon, 20% lycra/Spandex, 6% merino wool Optional Bluetooth control along with the Hotronic App allows you to control heat and monitor battery levels wirelessly Intelligent Charging Technology allows you to use USB charging to recharge batteries quicker and more efficiently while protecting the battery’s long-term health Provides PFI 50, 10 to 15mmHg compression Hotronic XLP BT Surround Comfort Heated Ski Socks (Adults')