Hi-Tec Asgard 200 Waterproof Trail Walking Boots Textile Suede and Mesh Upper - Provide a breathable and durable shell, keeping your feet comfortable and protected. Waterproof Bootie Construction - Keeping your feet dry from any water splashing. Durable Shell Construction - Protects against rips and tears. Thermo-Dri - Integrates Thinsulate insulation, seam sealed waterproofing and quality leathers with a cushioning EVA Midsole, active flex points and a four layer polymer material in the heel and toe. Thinsulate Insulation - Providing warmth without bulk. The micro-fibres of the Thinsulate insulation are about ten times smaller than any other synthetic insulations, making them ideal for trapping insulating air.