Lululemon built this anti- stink polo to keep you comfortable throughout the round and into the clubhouse. Sweat wicking fabric is 4 way stretch. Added Lycra fiber for stretch and shape retention. Silverescent technology, powered by X-STATIC, inhibits the growth of odor-causing bacteria on the shirt. Mesh venting encourages airflow and keeps you cool. Reflectived details help keep you on the radar. 80% polyester, 10% Tencel, 5% Lycra Elastane, 5% X-STATIC nylon.