*Unidirectional rotating bezel with a corrosion resistant anodized aluminum insert.
*Guaranteed waterproof to 1,200 meters, or 4,000 feet
*Ultra-thick synthetic sapphire crystal.
*Helium escape valve. Developed in cooperation with a French industrial diving company, Comex, the helium escape valve allows helium molecules to safely escape without popping the crystal off the watch during decompression.