Come and see our amazing products. The breathable mobile phone arm bag is made of PU and polyester. High-quality environmentally friendly materials, light weight, foldable and stretchable, breathable, and delicate texture helps to absorb sweat. There is also an anti-sweat lining that allows your skin to breathe and keeps your phone dry at all times. Built-in earphone jack, put the earphones through the earphone jack at the bottom and connect to your mobile phone. Its size is approximately 7.09x3.74x1.57 inches. We welcome customized logos, please contact us. Pls confirm with us about the packing info, stock color and exact production time before placing your order.