Nathan Sonic Boom Black/Lime Iphone 4

Sleek armband offers easy-touch window. Ergonomical design integrates NDurAthletic™ and moisture wicking material. Fit either iPhone 4 & 4S, or iPhone 5. Unique hybrid of silicone and performance textiles delivers enduring protection|Soft ergo-armband optimizes comfort and eliminates friction|Reflective hits promote lowlight visibility up to 1200 ft