Resin wristbands are made of premium resin. Each piece of resin was slowly polished to perfection. In comparison to stainless steel, resin materials are not only lightweight but also more durable, stronger, and avoid fading. They are water resistant: in general-suitable for wash hands; swimming and snorkeling, but not scuba diving. Fits the size of wrist: 5"-7.8" wrist. However, it is adjustable and includes watch adapters on both ends. Adjust the length easily with a link removal tool. Easy to lock on, never fall off and quick removal.