i Play combines great quality with fun colors and patterns to create swim trunks that boys love! With an elastic and drawstring waist, these trunks will stay put even on the most active boys..The trunks are made of UPF 50 material to provide protection from thr suns rays.The trunks have a built-in Ultimate Swim Diaper which consist of a wick-away and super absorbant inner liner. Several playful and colorful prints are available.