Silicone Fasteners Ring for Fitbit Alta and Flex (Mixed Color, 10 Pack) Designed specially for Fitbit Alta to protect the Clasp Loose and Band fall off. Comfortable and lightweight - Be made from featured and durable Silicon. Perfect fit for your Fitbit Alta activity tracker and comfortable wearing experience. Colorful and fashionable: secure your wristband in style and give your Fitbit Alta new fashionable look. Simple to use: Just slide the fastener over the clasp when you put on your Fitbit Alta