Merrell Women's Thermo Akita Mid Waterproof Black Size:UK 4 Can be used on its Can be used on its own or as a protective cover for your sleeping bag 2 layer GORE TEX fabric with a 75D recycled polyester plain weave face is durably tough yet soft to handle 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 The Merrell Women's Thermo Akita Mid Waterproof in BlackWaterproof 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