Back Bay Fitness designed this No-Slip Running Armband to prevent slipping and maximizing comfort during your run. The armband features Back Bay's exclusive RunGrip material that comfortably keeps the armband from slipping even when you sweat! A good armband is one that you can forget you're wearing. This armband carries your phone, keys, and credit cards. With special RunGrip material, the armband will never slip or bounce. Run, bike, or do any activity without ever having to adjust your phone!