The Arktos Outsole System is comprised of five performance layers for great outdoor boots. Starting from the inside, a terra suspension footbed returns to its original shape after every step while flex groove channels allow for increased flexibility. Layers two and three are dual comfort layers.The thermal polyurethane cleats allow for easy acceleration on any terrain. You won't be weighed down by these boots; you're ready to move. The outsole has an aggressive rubber skin that releases dirt and is durable and stable. Goodyear Welt Construction. Terra Suspension Footbed. 200 Grams of Thinsulate Insulation. Climate IQ. 9 inches in height. Full-grain leather upper with high abrasion nylon panels. 5-Layer outsole system.