Peter Millar Rio Technical Long Sleeve Performance black top Size large True to size. Considered a Regular fit; cut with a little extra room through the chest and body for comfort. Breathable performance fabric brings moisture-wicking comfort and UPF sun protection to a long-sleeve T-shirt cut with chafe-free raglan sleeves. Reflective details enhance visibility in low light or at night UPF 50+ protects against the sun's harmful rays 95% polyester, 5% spandex or 92% polyester, 8% spandex Crewneck Four-way-stretch fabric offers maximum stretch for wide range of motion Moisture-wicking fabric dries quickly to keep you cool and comfortable