Merrell Fraxion Thermo 6 Waterproof leather-and-fabric Waterproof PU coated leather and fabric upper - A durable, abrasion resistant structure. M-Select DRY Technology - Keeps your feet dry when on the move by selecting just the right type of waterproof construction and materials 200g M Select WARM - an insulation that reflects and retains body heat through micro-spaces, trapping the hot air within its internal environment to deliver efficient warmth without bulk. M Select FRESH technology - Naturally prevents odour with friendly microbes that break down perspiration on contact with natural enzymes. Bellows tongue - Keeps debris out.