GripGrab UPF 50+ UV Protect Arm Sleeves Size:S Discover the perfect companion for Discover the perfect companion for your running training with the Fusion S1 Running Vest for men The outside of these tights is extra super fine knit to repel cold and wind and a soft and thermoregulating inside that retains the body's natural warmth The highly breathable UPF 50+ material effectively shields the arms from harmful UV rays while ensuring optimal ventilation these summer arm sleeves stay firmly in place during every ride