It is the night reflective design that makes the arm bag can improve the safety warning of night cycling. And it has convenient earphone hole design. The sensitive touch screen makes you can operate the phone normally.This belt bag not only has a double-pocket design and large capacity, but also very convenient to use, which can be put in mobile phones, keys, wallets, etc.It is constructed of diving cloth material.There are two sizes for your choice: L and XL. Suitable for climbing, outdoor sports, shopping, running, etc.Item Name: Running Arm BagMaterial: Diving ClothFeatures: Adjustable, Shockproof, Touch Screen, Earphone JackSize Details:Size L: 17.5cm x 10.5cm/6.89" x 4.13" (Approx.)Size XL: 19.5cm x 12cm/7.68" x 4.72" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Running Arm Bag