Eric Koston Nike SB x Koston Max90 Skate T-Shirt Why not do a kickflip? Designed in collaboration with Koston, this soft cotton tee has a roomy fit for a casual look that moves with you. Midweight cotton fabric feels soft and has a slight drape. Dropped shoulders, longer sleeves and a roomy fit through the body and hips give the Max90 tee a relaxed and casual look.