Flex 2 is Fitbit's first 'swimproof' fitness tracker - The Verge
Rubber Band for Fitbit Flex 2 – North Street Watch Co.
Amazon.com: Greeninsync Compatible with Fitbit Bands for Flex 2,Sports Silicone Replacement Wristbands Strap with Metal Clasps and Fasteners for Fitbit Flex 2 Fitness Smart Watch Lavender Small : Electronics
Fitbit Flex 2 Accessory Band 3-Pack, Pink/Lavender/Magenta | eBay