The company has created its X Pro Custom Heat boots with liners that deliver consistent, even heat all the way around the foot, rather than the limited range of after-market heated insoles, said Matt Carroll, general manager and hard goods buyer for Double Diamond ski shop in Lionshead Village.
Heated clothing designed for use on vehicles such as motorbikes or snowmobiling typically use 12 volt electric current, which is the standard voltage on motorsports or powersports batteries. While a single heated garment, such as heated gloves will not usually adversely affect the charge on the battery, riders have to be careful about attaching several heated garments, such as a heated boot liners, gloves, and a heated vest, because the battery may not be able to handle the load. The heated garments are usually attached directly onto the battery of the bike. Some heated garments have cigarette lighter plugs, so that the clothing can be plugged into a car's cigarette lighter. While the least expensive models can only be turned on or off, the more expensive models sometimes provide a heating level control.
The process is not all that involved and takes less than a half hour. You insert your feet into pre-heated boots and liners, which are then covered with a refrigerated overboot called a Cooling Pad. But before doing that—and this is where McKenna’s experience came into play—an appropriately sized Fischer neoprene toecap was fitted over the forefoot along with bits of open-cell foam to relieve points of pressure.