Outerknown is an American clothing brand. The label was founded by designer John Moore and surfer Kelly Slater. Find preowned Outerknown clothing on Depop. Shop secondhand clothes for casual, everyday wear in heavy duty cotton and corduroy. Explore used apparel with oversized slogans and tie dye, graphic and stripe prints. Discover lounge apparel for lazy days. Search for denim in a range of washes and fits. Look out for the OK 10 capsule clothing collection and more online.