NIKE Challenger Crew Neck Pinwheel Camo T-Shirt Dri-Fit Fabric - To wick away sweat and help keep you dry and comfortable. Crew Neck - For a more comfortable fit and increased ventilation. Flat-Seam Construction - To minimize chafing. Rounded Hem - For a fit that stays in place. Ergonomic Seams - That contour the natural shape of the body.