Men's tank top, rower model, 1X1 rib, wool blend, narrow shoulder strap. All the warmth of wool combined with the practicality of other fibers, for unique comfort. 1x1 rib - Wool and Meraklon The comfort and warmth of wool combined with the practicality of other fibers, adapts perfectly to the body, wide shoulder strap, wide neckline, comfort and warmth on your skin, classic style, 1 x 1 rib. Composition: 50% Wool - 50% Polypropylene.