Speedo Hyperboom Splice Brief Mens Made from our Endurance + fabric, these briefs are perfect for fitness training and offers a comfortable fit thanks to their four way stretch technology. They may feel soft when they're on, but they're reassuringly secure too with their drawstring waist. The black and blue Boom Splice Brief is designed to last longer and keep their shape for an enhanced fit. Plus, they resist fading longer than any other swim material too! Features Drawstring Waist - For enhanced fit and security 100% chlorine resistant, so your swimsuit won’t degrade in the swimming pool Freedom to move – 4 way stretch technology for comfort and softness Endurance + fabric retains its shape and resists fading longer than any other swim material.