Merrell Thermo Akita Mid W P Boot Black Category_Shop By Activity Backpacking The FireMat is designed to The FireMat is designed to reflect radiant heat Perfectly designed with all the thoughtful touches you'd expect FEATURESWaterproof membrane seals out water and lets moisture escapeWaterproof coated leather and mesh upperMetal hook traditional lace closureBellows tongue keeps out debrisGaiter D RingBreathable mesh lining200 grams lightweight low bulk insulation keeps you comfortableFleece collarKinetic Fit™ BASE removable contoured insole for flexible supportMerrell Air Cushion in the heel absorbs shock and adds stabilityMolded nylon arch shankLightweight EVA foam midsole for stability and comfortMerrell sticky rubber outsole tuned for winter optimizes traction over cold weather surface conditionsLug Depth: 4