Rip Curl Monaco Watch, Black. 316L Stainless Steel (The highest grade of stainless steel for water resistance, strength & non corrosion in a marine environment), Synthetic rubies (These serve as bearings for gears in watches. This reduces torque & friction allowing your watch to run more accurately for longer), The Best Looking Bull In The Paddock., Waterproof tested to 100m, This Rip Curl watch is extremely stylish, easy to use & perfect for everyday use.