How weatherproof are your rocks?

Very much so. Our rocks will stand up to rain, sleet, snow and everything in between. Each rock is a sealed enclosure. In case water does enter the rock, each has a tiny drain hole to allow water to escape.

As a demonstration at the tradeshow, StereoStone puts a rock into a bucket of water and let's it play all day. Although this isn't recommended, it attests to how "waterproof" it is.