This arm bag is made of eco-friendly and water proof neoprene, measuring 5 29/32" x 3 15/16" inches. It offer great convenience for you to carry your cellphone, pockets and other small things when you are doing sports. It is great for promotional gifts, birthday gifts, opening ceremonies, trade shows and other promoitonal activities. The color can be customized. Also, there is a blank area for you to add your logo.