Hydrochromic swim trunks are all the rage, and the Parker is no exception. Quick-drying, it has a drawstring, comfy stretch waist, soft mesh lining, and a Bunny print at the front hem. And, of course, the hidden Bunny pattern that appears when it's wet. Waterproof bag included in back pocket.Also available for KidsWoven - 100% polyester mechanical stretch, inside net 76% polyamide, 24% elastaneMade in ChinaSwimHydrochromic Hydrochromic is a term used to describe a type of material that changes color when exposed to water. In the context of swim trunks, hydrochromic materials are used to create a unique and dynamic look. When the trunks come into contact with water, the material changes color, revealing a hidden design or pattern. The color change is temporary and returns to its original state once the fabric dries.