A new take on a Kamik favorite, the Sienna2 features waterproof bottoms with lightweight RubberHe outsoles for excellent traction. Stay toasty, thanks to 3M?? Thinsulate?? insulation and the extra-comfortable, removable insoles that retain warmth. These versatile boots let you walk to work with confidence in wet fall and winter weather.. . Upper: Combination of waterproof leather and water-resistant flannel. 200B 3M?? Thinsulate?? insulation: Keep warm in cold weather days with 200g 3M?? Thinsulate?? Insulation, protecting from the cold even in wet conditions. Perfect for cool days or high activity levels.. Moisture-wicking fleece lining. Molded antibacterial EVA footbed. Waterproof and lightweight synthetic RubberHe shell. DOVER lightweight, synthetic RubberHe outsole: Kamik spent two years perfecting the RubberHe, and it was worth it. As light as helium and as strong as iron, it offers superior traction and flexibility. Plus, it's 50% lighter than natural rubber and is 100% recyclable, so it's light on nature, too.. With their lightweight waterproof soles, these boots provide a great barrier between your feet and snow or water. Stay dry, no matter what it does outside.. Height: 10.5 inches. Weight: 2.31 lbs. per pair. Temperature rated: 4?F (-20?C). Built in the USA with domestic and imported materials.