Speedo End Jammer Swim Shorts Junior For kids who loves to be in and around the water, this jammer in classic black offers a playful style. With modernised fit and styling for 2020 it's perfect for any swim from lessons to training sessions. It has an enhanced, comfortable fit and internal drawstring for added security. Our 100% chlorine resistant Endurance+ fabric is the perfect choice, with 4-way stretch and quick drying technology, making sure kids will be comfortable in and out of the pool.