MAVIC COSMIC UV SLEEVESCOOLING ARM-SLEEVESIf you're out riding in the sun, chances are you'll get a sunburn if you're not wearing any protection. Many people don't like sunscreen or chemicals on their skin. The Mavic Cosmic UV Sleeves provides UC protection and moisture-wicking for hot summer days. It has 37.5 technology that accelerates evaporation and breathability. It wicks moisture 5 times faster than standard polyester. The sleeves provide UV protection of 30 UPF and they have flatlock seams to reduce irritation.FeaturesPreshaped with a soft fabric interiorUV protection of 30 UPF minimum37.5 technology accelerates evaporation and breathabilitySizingSizeExtra SmallSmallMediumLargeExtra Large2X Large3X LargeBicep Circumference (cm)24.92627.128.229.330.531.7Wrist Circumference (cm)15.61616.416.817.217.718.2Arm Length (cm)62.162.862.96363.163.363.5 | Mavic Cosmic UV Sleeves Men's Size Extra Small in Black