Adjustable arm band large range with two fastening sizes supports any arm girth from 8" to 16" to protect and stabilize the device without slipping or constricting during your indoor or outdoor activities. Sports cell phone armband for running is worry-free. The fitness arm band and exercise band is made from skin-friendly, breathable air mesh and stretch resistant neoprene polyester fabric blend with water-resistant, sweatpoof and washable functions, providing soft, odor-free and lightweight wearing experience. This running zipper pouch with double deck and double zipper exercise pouch provides large and safe space for your cellphone as well as your house or car keys, ID/credit cards, cash, earphone, cable, facial tissue and other accessories whilst doing outdoor activities.