Oboz Katabatic Storm GTX Winter Boots - Men's 10.5 US Medium Black Sea. Solarcore locks out freeze GORE-TEX keeps moisture out without compromise Trail Tread slices into icy unforgiving terrain like it was made for exactly this and the build stays precise and composed when everything around it is falling apart. Every other boot out here is a jeep but this one is a racecar. The difference is obvious the moment conditions get serious. Specifications for Oboz Katabatic Storm GTX Winter Boots - Men's: Manufacturer: Oboz Gender: Male Age Group: Adults Men's Shoe Width: Medium Color: Black Sea Footwear Type: Boots Activity: Winter Hiking Weight: 30.2 oz Footwear Closure: Laces Footwear Upper Fabric/Material: TPU Insole Material: SOLARCORE Aerogel Water Resistance Level: Waterproof Lining Material: GORE-TEX Invisible Fit Technology Insulation: Solarcore SC Foam Breathable Insulation Outsole Material: Vibram Ice Trek II Midsole Material: Compression Molded EVA Package Contents: Oboz Katabatic Storm GTX Winter Boots - Men's Oboz 030389OB-10189-10.5-Medium: Katabatic Storm GTX Winter Boots - Men's 10.5 US Medium Black Sea