These Mobile Mob AirVent Fitbit Charge 3 bands & Fitbit Charge 4 bands are made for those sporty or active people who tend to work up a sweat. These sporty straps have vents that help your skin breath & minimise discomfort. Changeover instantly - direct replacement and take seconds to clip on and off your fitbit tracker. Easily adjust the length for the perfect fit with the adjustable buckle. Available in 12 colours Silicone band with vents Size: Small & Large Size S: about 130 - 180mm / 5.12 - 7.09 inch Size L: about 160 - 220mm / 6.30 - 8.66 inch Adjustable buckle Inkdly accessory Wholesale pricing available for printers, promotions etc SUITS THE FOLLOWING MODELS: Fitbit Charge 3Fitbit Charge 4