Get ready for picnics, yard get-togethers, day nights and anything in betweenGarden accessoriesPicnicware 100M Water resistant: Which has a drinking water resistance of nearly 100M you can easily cope with most circumstances in life, such as washing arms, rain, swimming(make sure you tighten the crown when likely in the water). https://www.watchesworld.com/a-history-of-watch-reference-numbers/