Add a little bit of luxury to your overnight excursions into the mountains with the Outdoor Research Tundra Aerogel Booties. Weather-resistant polyester shell helps shed water and wind to protect your feet from the elements. PrimaLoft Aerogel inserts helps create a thermal barrier between your soles and the ground. VerticalX insulation offers an exception warmth-to-weight ratio while retaining heat even when wet. Cinch cord around the ankle to seal in warmth. Anti-slip sole provides reliable traction. Shell: 100 percent polyester; Lining: 100 percent tricot; Soles: 60 percent polyurethane, 40 percent polyester; Weight: 9.3 oz. Imported. Measurements: Weight: 5 oz Shaft: 7 1 4 in Product measurements were taken using size L (Mens 8-11, Womens 9-12), width Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.