Prepare for picnics, backyard events, date evenings and all the things in betweenGarden accessoriesPicnicware 100M Water-resistant: That has a drinking water resistance of as much as 100M you can certainly manage most situations in life, like washing arms, rain, swimming(you should tighten the crown when likely in to the h2o). https://www.watchesworld.com/a-history-of-watch-reference-numbers/