Replacement Bands for Fitbit Flex,Nicpay 2PCS Large Size Silicone Wristband Accessory with Clasp for Fitbit Flex Bracelet Multi Color Sport Arm Band No Tracker -Black and Slate 2 Interchangeable wristbands:compatible with fitbit flex wireless activity trackers Made with high-quality durable and waterproof materialTPEwhich will not irritate your skin Free size wristband accessory: 6.3"8.3" circumference with 9 prong holes adjustable notches, so you can ensure a more secure fit Easily insert your fitbit flex tracker into the wristband, no tools needed.You can change the wristband everyday according to your outfit and mood NOTE:no tracker or other parts! for fitbit flex bands only! Not for fitbit one or other models! Replacement rubber bands with Clasps Only