Boxy's back! Our favorite shoebox is all in on our motto that helps us inspire, motivate and be creative while rocking this long-sleeve Nike cotton tee: Just Do It. Everyday cotton fabric feels soft and lightweight. Fit feels like your classic tee that's not too loose and not too slim. Ribbed collar stretches so you can easily take the tee on and off. Ribbed cuffs help keep your sleeves' fit in place. 100% cotton. Machine wash.