A proprietary waterproof, breathable membrane that lets vapor out without letting water in.
A lightweight insulation that keeps you warm. Who knew charcoal bamboo could create something that keeps your feet warm? But it makes KEEN.WARM - a lightweight, anti microbial insulation that provides warmth where you need it most.
THERMAL HEAT SHIELD FOOTBED
On the outside, wooly softness; in the middle, support cushioning; and inside, a thermal foil barrier to harness radiant heat. Keeps the cold out and the heat in.