Compatibility: RuenTech watch band retainer compatible with Garmin Vivoactive 3, Vivoactive 3 Music, Forerunner 245, 245 Music, Forerunner 645, 645 Music, Venu, Venu Sq, Vivomove, Vivomove HR, Fenix 6S, 6S Pro, 6S Sapphire, Fenix 5S, 5S Plus, 5S Sapphire. Anti-slip design: The fastener rings feature a notch to secure the hole and help keep the extra band in place. Safe material: Made of high-quality silicone, soft, flexible, comfortable, and durable. Safe for sensitive skin. Easy to install: Flexible watch band keeper; simply stretch or slide the ring over the metal clasp for quick installation. After-sale service: We stand by our products with lifetime customer support. Replacement or refund available for any issues.