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