A pinnacle apparel collection geared for the gruelling UTMB Mont-Blanc, our World Series capsule cues up featherweight materials that layer easily and pack in a pinch. Designed for breathable, moisture-wicking warmth, the Flight Arm Sleeves enlist corespun merino jersey, mesh panels at the elbow, and grippy silicone elastic to stay put. Worn in lieu of a long sleeve tee, these articulated arm warmers offer enhanced visibility via reflective logos. HOKA Flight Arm Sleeves in Black, Size Large