4.7 OZ. 64% polyester. 33% recycled polyester, 3% elastane. Opti-Dri technology transfers moisture away from the body to keep you cool and dry. UV Block technology keeps skin safe from the sun's harmful rays. UPF 15+. Stretch fabric moves with you to increase your range of motion. Self collar. Open sleeve. Sustainable and wearable performance fabric made with recycled polyester. Double needle hemmed bottom with side vents.