Fabric: 100% Polyester. Lightweight, breathable, and soft with 4-way stretch for excellent flexibility. Sun Protection: UPF 50+ fabric blocks 98% of UVA/UVB rays to help you stay cool outdoors. Quick Dry: Moisture-wicking material dries quickly to keep you dry and comfortable. Reflective Elements: Reflective strips on the arms improve visibility in low-light conditions. Occasions: Ideal for beach volleyball, surfing, running, cycling, hiking, fishing, camping, tennis, and summer travel.