Water can cause havoc with most optics, but it won't phase Tasco off shore binoculars. Water and fog can't penetrate them - rubber O-rings seal the nitrogen-purged tubes, keeping your binoculars free from moisture. The multi-coated optics offer premium light transmission for low light situations while eliminating the glare that is often prevalent in marine environments. A convenient storage/carry case, strap and cleaning cloth are also included.