Outdoor Research Echo Tee Men's. Pace your run through sunny basins and shaded forests in this light, trail oriented tee. Polyester AirVentTM fabric manages moisture and provides UPF 15 sun protection. Flat seam construction reduces chafing, and Polygiene odor control keeps you fresh whether it's your second or tenth day out. Raglan sleeves and flat seam construction reduce chafing, making a long day with a pack on your back that much more enjoyable. Favorites for warm weather adventuring, shirts from the Outdoor Research Echo collection are lightweight, sun protective, comfortable and performance oriented layers ideal for everything from running, to hiking, to climbing and much, much more.