Travelzoid™ swim shorts responds to temperature changes. So, these color changing swim trunks need warmth and cold to show what they can do. When you’re wearing these swimshorts, they’re (usually) warm due to your body heat and the warmth of the sun.☀️
To change your swim short's color simply get cool! That means splash, jump or dive into the water and watch them change!
Please note that swim trunks tend to run small. Please look at the sizing chart before you buy. If you wear a medium, you might want to consider a large... etc.