Boot will secure a compass to your wrist, like a watch Fits most standard compass modules of 2.5″ from brands like Sherwood, Genesis, Oceanic, Aqua Lung, and many more. Made of durable rubber with a brass nickel-plated buckle. It will not fade or wear over time. The boot has a side scan notch for accurate navigation of the side-reading gun sight. The strap is long enough to fit with or without a neoprene wetsuit or even a dry suit.