The Cortech Adrenaline Pants are made with a combination of perforated and non-perforated top grade, drum dyed, 1.2-1.4mm leather. These durable materials work in conjunction with the triple and double stitching (with high strength bonded nylon thread) to make these pants last no matter how hard you ride. For flexibility and ease of movement, these Cortech Pants have accordion-style expansion panels at the knees and waist, as well as heavy duty, 600 dernier stretch nylon panels in the inseam and calves. Some riding gear isn’t exactly comfortable after spending an extended amount of time on your bike, but the Cortech Adrenaline Pants have pre-curved knees to give you optimum comfort and performance while you’re in the riding position. The elastic waist also helps to provide comfort and a fine tuned fit. Some other convenience features include: an optional knee slider attachment, full circumference 8in pant to jacket zipper, and mesh lining throughout to enhance air circulation. Cortech’s ‘Adrenaline’ line also includes: the Cortech Adrenaline II Gloves, the Cortech Adrenaline Leather One-Piece Suit, and the Cortech Adrenaline Jacket. Check out the Cortech Adrenaline Pants, Cortech gear, and other motorcycle pants options on our website: CompetitionAccessories.com!