GOOQ&reg; Replacement Magnetic Clasp Strap for Fitbit Flex Activity Tracker Sports Monitor Armband and Sleep Tracker Bracelet Wristband 100% brand new and high quality Suit For Fitbit Flex Easy to install the device and easy to wear & clean Made of quality silicone material, Light and soft The magnet inside the clasp can firmly adsorb your Fitbit Flex Sports Activity Tracker Monitor