Gym Sport Running Workout Sweat-resistant Armband Case Cover for Nokia Lumia 521 T-Mobile, Metro PCS, 520 AT&T by CyberTech This armband is made of neoprene material. It is sweat-resistant, water-resistant, and washable. With the Clear Plastic Cover, you can operate your full touch screen easily. It has a built-in key slot with no added bulk and it works with most cases. It is lightweight and durable. It is compatible with Samsung Galaxy S5 i9600 / S4 i9500 / S3 i9300 / S2, Apple iPhone 5S / 5C / 5 / 4 / 4S/ 3, HTC One, Motorola Blackberry Z10 / Droid Razr HD / Droid Utra / Droid maxx / Droid Mini / Defy XT, Nokia Lumia 928 / 520 / 521 / 925 / 1020, Sony Xperia Z, Google Nexus 4, LG Optimus L9(Screen size up to 5"). It fits arm width from 6" ~ 16". Color: Black, White, Blue, Pink (Depend on Availability)