Fabric: 100% Polyester. Material: Soft, sleek, lightweight, breathable polyester fabrics. Quick Dry: Breathable, lightweight, quick-drying fabric actively wicks moisture away from the skin, keeping you cool, dry, and comfortable in running and hiking. UV Protection: The fabric rating UPF 50+ protects your skin from harmful UVA/UVB rays, keeping you cool. Half-Zip Design: The design allows for neck coverage, effectively protecting your neck from UV ray interference. Perfect For: Outdoor activities like golf, basketball, fishing, sailing, swimming, hiking, running, jogging, workout, and fitness.