1Two separate pockets allow you to easily place your phone, headphones, cable, wallet, ID card, credit card, keys and other small items to make the phone won't get scratched by the keys. 2The arm bag is compatible with phones and devices under 6 inches, such as for iPhone/Samsung/HTC/Moto/SONY/Xiaomi/Huawei, etc. 3The handrail bag is made of highquality fabric and weighs only 0.06kg/2.1oz which is comfortable, breathable, waterproof and sweat proof to keep the phone safe and dry and the soft material make sure that the arm bag does not scratch the skin during movement. 4The straps are comfortable and breathable, allowing the arm pockets to cling tightly to the arm without loosening during movement, the strap can be stretched to 40cm/15.7in and is suitable for all sizes of 11 to 16 inch arms, there are two ways to wear it, which can be worn on the forearm and upper arm by adjusting the armband. 5Suitable for many conditions such as mountaineering, running, exercise, traction, travel, weight lifting, cross training, hiking, biking, walking, fitness, marathon, horse riding and any other outdoor sport.