Stay comfortable and in style with this Fitbit Flex Accessory Band Pack. Each strap in this set is made of soft conforming material that will wrap smoothly around your wrist so you can continue to track your health. The open back design allows you to interchange your Fitbit which is sold separately as needed. It comes with three different colors allowing you to match them with your look. This set of Fitbit Flex wristbands are simple to put on with a push close operation. It s available in several sizes and allows you to track your steps while staying trendy.