100% Polyester. Material: Polyester. Fabric: Performance. Design: Laser Cut Holes. 2 Possible Positions Of The Headband, Built-in Ventilation, Low Profile, Pre-Curved Peak, Stretch Webbing Adjuster, Tearaway Label, Ultra-Soft Sweatband. Fabric Technology: Breathable, Lightweight, Moisture Wicking, Quick Dry. Fastening: Adjustable, Clip. Denier: 75D. Laser Cut Ventilation. Sustainability: REACH. Ref: UTPC4951