Nokian Footwear Koli - Top notch wellies for hunting, fishing and backpacking. This model has improved fit around the ankle for great performance on long days. - The new Erä outsole gives great traction on any forest floor and in rocky terrain - Improved torsional rigidity in the mid sole - Steel shank improves stiffness - Reinforcements at toe and side areas - Shock absorbing, removable insoles - Wide last, especially at the front - Tightening strap at the top - The out sole can be equipped with studs (a relatively easy do-it-yourself project with the separately available stud kit by Nokian Jalkineet) - Shaft height, size 37: 34.5 cm - Shaft height, size 42: 38 cm Inner sole measurements in extra image.