1Neoprene material is waterproof, elastic, shockproof, breathable, wearable, comfortable, durable and lightweight 2Earpiece hole lets sports be relaxing and pleasing by listening to music simultaneously 3Double pockets with large capacity are great for holding mobile phone, keys, changes, bank cards etc. during running, cycling, fishing, exercise and other outdoor activities 4Band with widening design can fit your arm well and not easy to slip to allow you to do sports freely 5Band with hook and loop closure is adjustable for comfortable fit and can fix the bag on your arm securely