Ship from Hongkong. This arm warmer is great for a variety of outdoor activities, such as bike cycling, skating, hiking etc.. They protect your arm from sunlight and Quick-Dry, flexible and breathable when cycling. We have many different kinds of arm warmers for your selection. Size: (upper) 28 CM* (down) 19 CM, length: 48 CM. Make of dacron & anti-slip glue. XL: (upper) 28 cm* (down) 19 cm, length: 48 cm. Sun protective, breathable, quick-dry. Perfect for cycling, hiking and other outdoor sport-use. Color: Black & Blue.