Kamik Men's Goliath 1, 100% Rubber Synthetic sole Shaft measures approximately 16" from arch Heel measures approximately 2" Boot opening measures approximately 21" around Conquer the elements with the tough protection of the Kamik&reg; Goliath 1 boot! Rubber(He) upper with an adjustable 1000 denier weather collar. 100% waterproof rubber. Removable 15mm Zylex&reg; 2F liner is a four-layer version of Kamik's Zylex liner that keeps your feet warm and dry in extreme temperatures. It is also easy to remove for quick overnight drying. 11mm Zylex&reg; insole offers excellent underfoot cushioning and helps wick away moisture for drier foot environment. Kamik's LOYALTY Rubber(He) outsole is acid and oil resistant. Comfort rated for -75&#176;F/-60&#176;C. Made in Canada. Measurements: Heel Height: 2 in Weight: 3 lbs 10 oz Circumference: 21 in Shaft: 16 in Product measurements were taken using size 13, width D - Medium. Please note that measurements may vary by size.