Grass & Air - Color-Revealing Rain Boots perfectly accessorise with a smear of mud, then let them run free. Featuring our innovative colour-revealing technology, the raindrop pattern transforms from white to multicoloured when the wellies get wet. Once dry the raindrops change back to white ready for the colour-revealing magic to start again. The technology on these wellies is awesome, but it doesn’t like being left in direct sunlight or near heat sources.