Ship from Hongkong. This arm warmer is great for a variety of outdoor activities, such as bike cycling, running, skating, hiking etc.. They protect your arm from sunlight and waterproof, flexible and breathable when cycling. We have many different kinds of arm warmers for your selection. Size: (upper) 11 CM* (down) 7 CM, length: 46 CM Make of dacron & spandex. Cool tattoo design. Sun protective, breathable, waterproof. Perfect for cycling, hiking and other outdoor sport-use. M: (upper) 11 cm* (down) 7 cm, length: 46 cm.