This is an Osmosis shirt (with slits in the sleeves, see image). I've worn it a few times, and it's been stored in a closet for a long time since then. Color: Navy and White Material: 100% Polyester It's smooth and comfortable to wear. * Please understand that this item has been stored in a closet for a long time. It will be folded small for shipping, so please forgive any creases.