Bitbelt Jr (Small Width) 12 Pack (one of Every Color, 3 That Glow in The Dark!) Compatible with Disney MagicBand (Kids) Fitbit Alta, Flex, Amiigo, Striiv, Garmin Vivosmart, Misfit Secures: Fitbit Alta, Fitbit flex, Garmin Vivosmart, Amiigo, Striiv. If you are wondering which bitbelt is best for you just send us an email and we will help you. For Fitbit Flex 2 check out the bitbelt jr 2. SIMPLE AND FUNCTIONAL: Slide the ring over the clasp when you put on your wristband, simple as that The only safety clasp recommended by Fitbit, as seen on www.wdwprepschool.com. Light Weight, Hypoallergenic, we invented the secondary tracker clasp. Often imitated, never duplicated Try out our lost fitness tracker app : https://play.google.com/store/apps/details?id=com.fitnesstrackerfinder American Company with Impeccable customer service. We invented the clasp fix, choose bitbelt to keep your fitness tracker safe from loss. Often imitated, don't accept a cheap safety band for your expensive tracker. If there is a problem we fix it, plain and simple.