Compatible Models: Fits for Noise ColorFit Ultra/Ultra 2, Vision, Caliber, Pro 3, Active/GPS, Buzz, Core, Nav & Nav+, Endure Smartwatch. Water-proof, sweat-proof, replacement wrist strap only, no watch included.- Made of high tensile silicone with matte Multi Colors Perfect buckle. Environmental protection, no peculiar smell and harmless, no deformation, no color fading, sturdy and long service life.- Breathable: The holes on the band makes it more comfortable to wear and makes your skin breath freely Ventilation Holes Design makes it wear cool and dry after you sweat during the sports.- Size: Suitable for wrist 5.6''-8.1 ''.You can adjust the length or change the way you wear it.The replacement wristband with a stainless steel buckle to ensure your watch secure during strenuous exercise and a strap holder to secure the extra length. No worry about your smartwatch falling off.- Comfort and Perfect for Fitness: improves comfort and airflow Waterproof and washable Perfect for fitness and active lifestyles.