Vetu Replacement Accessory Wristband with Metal Clasp for Fitbit Alta Fitness Activity Tracker Swap out any Fitbit Alta tracker accessory for the different color band to shake up your style. The design of the band conform to ergonomics,made of a flexible, soft ,durable elastomer material, very comfortable. For Fitbit Alta only, (Not for For Fitbit flex, blaze, Force or other models(Note: Fitbit Alta Fitness Activity Tracker is not included) -Free size fit your wrist depend on button site you place. Small fits wrists 5.4~6.9 inch in circumference. Large fits wrists 6.3~8.3 inch in circumference.(Note:for the fasterners, we will send random colors) Simply Remove your Sensor, detach your Clip, put it in Your new Band.