PrimaLoft® thermal insulation material is almost weightless and extremely warm. It is made of "synthetic down" mixed with unique ultra-high-quality fiber materials and meets the needs of outdoor lifestyle. Even when it's wet, raining, snowing, sleeting, or even overturned drinks, as long as you wear Timberland® items made of Primaloft® thermal material, you'll still feel the warmth and defense. Premium waterproof leather and seams seal our shoes, or use internal waterproof and breathable membranes to keep feet dry.