Joyzy Ankle Bands with Mesh Pouch for Fitbit, 2 Pack, Step Counter, Activity Tracker, Fit Watch, Reflective for Running, 11Inch and 9 Inch (Tracker Not Included) Fit for wrist or ankle with circumference of 8~12 inch Highly reflective, enable youself be seen by motorists in dark from distance. With a small mesh pouch on one side, you can put fitness tracker, essential oil, mosquito repellent or other small things inside. Compatible with the following models: FitBit Alta Fitbit Alta HR fitbit flex 2 FitBit One FitBit Zip Fitbit flex any fitness watch 1.7inch*0.8inch. Extremely soft and comfort on your skin, can be washed by machine If any problem, send us a mail, we would reply within 24 hours, give you replacement, refund, whatever you request