On the sole

The Frame Strap is comfortable and makes clicking in and out easy

Blue nylon perimeter bristles

Improved flex index

Hotronic Attachment Straps (Open Box Return!) BINDING MOUNTING On the sole*Open Box Return. Packaging and box has been opened and damaged. Product has been inspected and tested in house at Utah Ski Gear to ensure it is still fully functional and in new condition Hotronic Attachment Straps are used to secure your Hotronic battery pack to your leg or on the top of your chosen footwear for hours of warmth and comfort. These straps can be used as power straps on your ski boots for better performance. Use them with Hotronic