Speedo Boy's Endurance Swim Briefs are made using advanced chlorine-resistant fabric that will not lose shape over time. The elastic waistband has an internal draw cord that allows you to customise your fit while the front of the brief has been lined for added comfort. Available in a range of colours, the 5cm endurance brief is ideal for swim training and regular pool use. This pant is ideal for training and regular pool use. Made from Endurance+, an exclusive Speedo fabric designed to last longer, it is 100% chlorine-resistant to prevent snagging and fading 20 times longer than any other swim fabric. This fabric also features 4 way stretch technology for added softness and comfort. Fabric: 80% Polyamide & 20% Elastane 100% chlorine-resistant Endurance fabric is quick to dry and engineered to retain its shape Waistband features an adjustable drawstring The front of the brief is lined for added comfort and coverage Ideal for training and regular pool use Features Fabric: 80% Polyamide & 20% Elastane 100% chlorine-resistant and quick to dry Ideal for training and regular pool use