Speedo Allover V Jammers. Stand out for having great style as well as your performance in the pool. These striking competition Jammers will give you the confidence you need to take on the competition in comfort. Made from our 100% chlorine resistant and designed to promote a smooth, hydrodynamic profile in the water these Jammers are made from Speedo's Endurance®+ fabric. Featuring an eye-catching print, they offer fantastic freedom of movement whilst the drawstring waist offers a more secure fit.