kwmobile Silicone Watch Strap for Fitbit Zip - 2X Fitness Tracker Replacement Band Wristband Bracelet Set with Clasp COMPATIBILITY: Made to fit Fitbit Zip SOFT MATERIAL: TPU silicone strap set in black dark blue is flexible, waterproof and durable; protects smart watch from scratches and wear and tear ADJUSTABLE: Band measures approx. 14 - 20 cm and can be adjusted with the buckle. Provides perfect fit for running, jogging, biking and other activities NEW LOOK: Personalize your activity tracker with these straps in different colors or use the bracelets as replacement bands NOTE: Silicone watch strap does NOT include fitness tracker