This Seiko Prospex watch is perfect for men who love underwater exploration or outdoor adventures. It can be worn while diving, swimming, or even in tough outdoor conditions. The watch is powered by the 6R55 automatic caliber with a 72 - hour power reserve. It has a 300m water resistance, a unidirectional rotating bezel, and LumiBrite for good visibility in low - light. The scratch - resistant sapphire crystal and screw - down crown add to its durability.