This Eddie Bauer men's cobalt blue full - zip smooth fleece base layer is great for men who love working out or exploring the outdoors. You can wear it during your daily gym sessions or while hiking in the mountains. It's made of 100% polyester fleece, which is 9.3 - ounce. The smooth - faced and brushed - back design feels really comfortable. With open cuffs and hem, zippered pockets, and reverse coil zippers, it's very practical. It can also be customized with a company logo for team events or as part of company uniforms.