The Speedo Men's Solid Endurance Jammer Shots are ideal for swim training and regular use. Jammer styling offers more coverage to the legs and Speedo's exclusive Endurance+ is the longest lasting and best-selling training suit fabric. Endurance+ is 100% chlorine resistant fabric designed to lasts 20 times longer than conventional swimwear fabrics. Four-Way Stretch technology also provides a body-hugging fit, great shape retention and soft comfort. The 50% Polyester and 50% PBT Fabric has low moisture absorption and is quick drying. The Endurance Jammer's have a front gusset and an inside drawstring waist for a secure fit. Shorts are available in multiple waist sizes from 30" to 38" (76.2 to 96.5 cm) and come in black or navy colors.