All-Around SUN Protection: RUNCL arm sleeves (92% Polyester 8% Spandex) are proved to block 99.8 percent of damaging UV rays in laboratory tests, the polyester base is more effective than typical nylon at blocking UV rays, maximally prevents sunburn and long-term skin damage

Cooling Tech: Features special cooling fibers, reacts with sweat, helps to lower the temperature of arms up to 6 degrees. Spraying water on the arm sleeves gives you a dramatic instant cooling effect

Seamless Construction: Fitted with seamless construction with widen non-slip band, prevents rubbing and allows it to stay in place, offers ultimate comfortable wearing experience and will not make you itchy and leave imprints all over your arms like other sun sleeves

Moisture Wicking: The arm sleeves wicks moisture when dry to absorb sweat from the body, and the special designed mesh at the back offers added breathable ventilation, create an evaporative cooling effect

One Size Fits Most: The performance arm sleeves are stretchable enough to ensure stretchy fit for most men and women, and durable enough to guard against light levels of abrasions, great for landscaping and hauling brush