An IPX7 waterproof rating indicates that an item may be submerged in water up to a depth of 1 m for 30 minutes. If binoculars have this rating, it is a testament to their heavy-duty construction. It speaks of their ability to withstand abuses and tough environments.
Many binoculars are waterproof, such as the Vortex RAPTOR 10×32 and Nikon PROSTAFF 7S 8×42. However, only a few have an IPX7 waterproof rating like the Maven B.3.