The Northside Kathmandu Boot keeps your feet warm in extreme cold without compromising comfort Seam sealing and a topical spray keep out moisture so your feet stay dry A removable EVA insole is supportive and comfortable to keep the spring in your step even after many hours on your feet The Kathmandu Boot comes with All Terrain Grip so slippery winter surfaces wont get you down Suede upper/durable TPR rubber lower materials200g Thermolite? insulation is cold rated down to 25F12 5 shaft heightWaterproof lower section keeps your feet drySeam sealing and topical waterproof spray on upper to keep out moistureFaux fur collar for warmth and comfortD ring speed lacing system for convenienceRemovable EVA insole cushions the feetAll Terrain Grip System in sole for good traction on slippery surfaces