Applying more than 15 years of manufacturing experience. Using the best quality materials and first-class technology. We designed a world-class premium arm bag which made of stretch water resistant Diving Lycra fabric & Neoprene. Added breathability & comfortable. Never don’t worry about your iphone security. This arm phone bag easily bends, flexes, folds or twists without warping. Our premium armbands will be with you always, no matter when, where and what sports.