Outdoor Research Tundra Trax Booties - Men's Black Extra Small. The 100percent recycled Pertex Quantum Eco shell is water-resistant wind resistant and breathable. The 200 g/m PrimaLoft Gold insulation with Cross Core technology provides unmatched thermal properties and remains warm even when wet. The rubber traction sole prevents slipping on icy surfaces and the drawcord adjustable cuff keeps the cold air out. A comfortable and warm memory foam insole rounds out this bootie to make it the perfect choice for cold-weather adventures. For slip-on warmth when the temperatures plummet the Tundra Trax Booties are a seasonal staple. Specifications for Outdoor Research Tundra Trax Booties - Men's: Manufacturer: Outdoor Research Gender: Male Age Group: Adults Men's Shoe Width: Medium Color: Black Footwear Type: Boots Weight: 19.7 oz Fabric/Material: Pertex Footwear Upper Fabric/Material: 100percent Polyester Insole Material: EVA Lining Material: 100percent Tricot Midsole Material: PU Package Contents: Outdoor Research Tundra Trax Booties - Men's Outdoor Research 3005620001005: Tundra Trax Booties - Men's Black Extra Small