Comfort and durability are necessities for the modern explorer. The Radikl pant y Kuhl provides both in spades. Constructed with a sturdy nylon/spandex blend, these pants don't mind scrambling over boulders or kneeling on the trail. The Free Ryde™ waist, gusseted crotch, and added fabric panel ensure that you have ultimate freedom of movement. In carbon. Nylon/spandex blend.