iGadgitz Reflective Black Sports Jogging Gym Armband for Samsung Galaxy A3 SM-A300 with Key Slot iGadgitz custom-made running armband for Samsung Galaxy A3 SM-A300F Not Suitable for any other Samsung. Please note that this armband will not fit your phone if it is in a case or cover Produced from superior quality neoprene with reflective 'Jog Safe' banding Access to headphones and full use of the touch screen Secure adjustable armband designed for arms between approx. 24cm and approx. 33cm in circumference. If your arm is bigger than this you may wish to consider purchasing the iGadgitz Armband Extender Strap. Please search for the product by typing "iGadgitz Black Neoprene Extender Grip Strap" in the search bar above