WoCase Accessory Wristband (Classic Style) for Fitbit Alta (Best Gift for Fitbit Alta User) Activity and Sleep Tracker Wristband Band Bracelet (One size, Fits Most Wrist) Lost-proof Design and Stylish. Best pendant (patent pending) for Fitbit Alta activity and sleep tracker. The best way to wear your One and personalize your One to match your daily style with these brand new color choices. Perfect fit to your One tracker and comfortable wearing experience. 30 day money-back guarantee.