The primary materials that compose this product contain a minimum of 20 percent recycled content. Keep the elements in check with the superior protection of the Kamik Icebreaker rainboots! Rubber(He) upper with an adjustable 1000 denier weather collar. 100% waterproof rubber. Removable 8mm Zylex liner has a three-layer design that wicks away moisture, keeping your feet warm and dry in extreme temperatures. It is also easy to remove for quick overnight drying and is made of 97% recycled material. 11mm Zylex insole offers excellent underfoot cushioning and helps wick away moisture for drier foot environment. Kamik's TRACKER Rubber(He) outsole is acid and oil resistant. Comfort rated for -40°F/-40°C. (Yup, those temp conversions are correct.) Made in Canada with Canadian and imported materials Measurements: Heel Height: 1 1 2 in Weight: 2 lbs 3 oz Circumference: 17 1 2 in Shaft: 13 in Platform Height: 1 2 in Product measurements were taken using size 12, width D - Medium. Please note that measurements may vary by size.