Sleeves by ROCKBROS. Made of insulated material with a membrane insert, they're perfect for cold days. The material provides excellent thermal insulation, dries quickly, and doesn't absorb moisture. A membrane insert on the elbows protects against hypothermia. CHARACTERISTICS: made of insulated material elbow insert made of windproof membrane material unisex multi-panel cut for an anatomical fit wide range of thermal comfort highly breathable and moisture-wicking material flexible silicone puller reflector on the side material: 84% nylon, 16% spandex wash at 30 degrees, do not bleach, do not tumble dry, iron at low temperatures SIZE CHART: Size SM / L-XL / 2XL-3XL Length 38.5 cm / 41.5 cm / 45.5 cm Circumference at the top 26 cm / 29 cm / 33 cm Circumference at the bottom 18 cm / 20 cm / 22 cm ATTENTION: size S/M is marked on the packaging as M size L/XL is marked on the packaging as XL size 2XL/3XL is marked on the packaging as XXL