100% Nylon. Fabric: 4 Way Stretch, Woven. Design: Plain. Fabric Technology: Breathable, H2GO Shield, Insulating, Lightweight, Moisture Wicking, Quick Dry, Water Resistant. Neckline: Mock Neck. Quilted. Sleeve-Type: Sleeveless. Pockets: 2 Side Pockets. Fastening: Full Zip. Finish: Shine. Sun Rating: UPF 40+. S: 35.5 in. M: 37.5 in. L: 40.5 in. XL: 43.5 in. Ref: UTFS11139