HeatShields have been mountain tested in a variety of conditions across North America.

Mountain Sports and Living, included HeatShields in their 1998 gear test and reported a 10-20 degree F difference inside the boot...See "Conquer Cold Feet" by Ted Wardlaw Oct 1998 pg.152 - Click Here!
See also article by Charles Glass "Boot Heaters" pg. 95 of March 1998 Skiing Trade News (STN)
They are used by instructors at many ski schools including Killington, Aspen, Park City, Alta and all over the Poconos. HeatShields are also used by members of the National Ski Patrol and the University of Nevada Ski Team.


