The lightweight, waterproof Women’s ThermoBall™ Lace Up Waterproof are secure-fitting winter boots with durable recycled ripstop uppers and toasty ThermoBall™ Eco insulation. Upper Water-repellent, recycled P.E.T. ripstop upper. Waterproof DryVent™ bootie construction. Lightweight ThermoBall™ Eco insulation retains warmth even when wet. Collar bungee is adjustable to prevent snow from getting in. Comfortable OrthoLite® footbed made with 5% recycled rubber content.