Engineered for extreme winter performance, these insulated men's boots offer 100% waterproof construction to keep your feet bone dry. The premium aerogel frost barrier footbed is compatible with Fahrenheit Heat Warmer insoles (not included) to help your feet stay extra warm on icy cold days. Includes interchangeable OmniTrax 3.0 soles for customized traction on the fly: SnowTrac winter rubber lug, other soles can be purchased separately.