The quad lock sports armband introduces the convenience of the quad lock mounting system to runners joggers and gym goers no longer will you have to struggle trying to fit your smartphone into a neoprene or plastic pouch whilst in the knowledge you are locked in for your session when you hear the quad lock click you can be confident that your smart phone is securely attached the band is made from a comfortable nylon lycra that can be adjust for both small and large arms between a circu