We designed the KALK pants to have the absolute best ventilation you can get, with a cut and stretch designed for fast racing. They are super lightweight, breathable, and have fast-drying materials to keep them feeling breezy and light after hours of riding. Cut large on the knees to accommodate knee pads or knee braces and four-way stretch panels for freedom of movement. Rip-stop nylon high-abrasion seat panels keep you protected from wear. Full-grain leather inner knee panels provide optimal protection and durability.