With the Pearl Izumi Sun Sleeves 2018, you can have more fun in the sun thanks to UPF 50 sun protection. Compared to the older design, the 2018 sleeves have increased UPF coverage and added durability. The Pearl Izumi Sun Sleeves 2018 continue to provide sun protection, even when stretched by 30%. The sleeves provide excellent moisture transfer as you perspire while riding your bike. The sleeves also feature reflective elements to help remain visible during low light conditions. Lastly, the Pearl Izumi Sun Sleeves 2018 provide an easy slip on-fit.