Need an armband that doesn't slip? Look no further as we now have the Back Bay No-Slip 360° Running Armband. This armband is equipped with the RunGrip Technology that ensures it will never slip or bounce while you move. Its rotating, quick-release design can expand to fit any phone and rotates up to 360° for better access. This armband has pockets where you can place all your essentials and carry them with you while you exercise. Its adjustable strap can fit any arm with a circumference of 8.5" to 15".