Prepare for picnics, backyard garden events, day evenings and almost everything in betweenGarden accessoriesPicnicware 100M Water resistant: With a water resistance of nearly 100M you can certainly tackle most conditions in everyday life, which include washing fingers, rain, swimming(be sure to tighten the crown when heading in to the water). https://www.watchesworld.com/a-history-of-watch-reference-numbers/