Classic sports styling, straight from the Speedo design archives. These sporty HyperBoom 7cm Briefs nod to our brand heritage with a revival of our iconic go-faster Boom Logo stripe across the hip. An adjustable waist lets you tailor the fit. Be ready to go again in the quick-drying Endurance+ fabric, designed for durability with high chlorine resistance. Body made of 53% Recycled Polyester, 47% PBT. Endurance+ Fabric: Body made of 53% Recycled Polyester, 47% PBT. Recycled Polyester yarns are made from 1% post-consumer waste, such as recycled plastic bottles, with high chlorine resistance and quick dry Drawstring waist for enhanced fit and security Front Liner made from 1% Recycled Polyester