The Alpinist is built with HydroBlock® Pro 15,000mm waterproof/breathable technology for uncompromising waterproof performance. Warmth is provided by high lofting 40-gram synthetic insulation. The cargo pocket features a YKK AquaGuard® zipper and the lining is chamois fleece. A high performance pant for those that appreciate the technical details. Everything you would need to be warm dry and comfortable. From weatherproof features to convenient adjustability to accommodating your accessories and valuables.