iGadgitz Blue Reflective Anti-Slip Neoprene Sports Gym Jogging Armband for BlackBerry Z10 Smartphone Cell Phone. Textured dimple effect on back and straps grips the armband in place. Produced from superior quality neoprene with reflective 'Jog Safe' banding. Access to headphones and all controls, including full use of touch screen. Secure Velcro adjustable fastener. Minimum arm circ 26cm; Max 44cm. Water resistant. Perfect for jogging, cycling, gym etc.