Outdoor Researchs lightweight Echo S/S Tee is perfect for high-exertion activities and warm weather. Available in multiple colors, the soft, comfortable AirVent fabric breathes, wicks moisture and dries quickly when you pause to take in the view. Raglan sleeves and flat-seam construction reduce chafing, Polygiene prevents odor, and UPF 15 protection helps prevent sunburn on clear, warm days.