Pearl Izumi Sun Sleeves Protection From Harmful UV Rays Not everyone likes to wear sunscreen while they're riding since they'll have to reapply after a couple of hours. With some sun sleeves on your arms, you'll get ample sun protection so you can keep riding. Protect your arms from over-exposure to the sun with the Pearl Izumi Sun Sleeves. They'll feel like a second skin and provide optimal cooling and moisture management thanks to In-R-Cool technology. The Pearl Izumi Sun Sleeves deliver UV UPF 50+ sun protection with no need to reapply. Features In-R-Cool technology to provide optimal skin-cooling effect and moisture management when you perspire Elite Transfer fabric with UPF 50+ Sun Protection and Ice-fil Bio Viz reflective elements for low-light visibility Easy slip-on fit that stays in place while you ride Sizing Size Extra Small Small Medium Large Extra Large XX-Large Arm Length23 - 24"23 - 24"24 - 25"24 - 25"25 - 26"26"+Bicep9. 75 - 11"11 - 12"12 - 13"13 - 13. 75"13. 75 - 14. 5"14. 5 - 15. 25"Wrist5. 75 - 6. 5"6. 5 - 7"7 - 7. 5"7. 5 - 7. 75"7. 75 - 8"8 - 8. 25" | Pearl Izumi | Sun Slvs Men's | Size Extra Large In Black