The speedo Logo 6.5cm swim trunks for boys come with an internal drawstring Secure Fit for an optimal fit. The lined front panel offers added comfort and modesty and the 100% chlorine resistance ensures long-lasting performance. Dries faster after swim training. Endurance 10Enjoy swimwear that fits as well as it would new - no matter how often you train. The fast-drying speedo Endurance10 fabric is specially designed to stay in shape longer. And thanks to the use of Creorra Highclo Elasthan, the material is even more chlorine-resistant and therefore lasts longer.