Sleek black and timelessly stylish these Essential Endurance+ Jammers are made from our Endurance+ fabric. Perfect for fitness training, they offer a comfortable fit thanks to the four way stretch technology. Designed to hug the contours of your body to create a hydrodynamic profile in the water, they feel soft when they're on but are reassuringly secure with their drawstring waist. Slow to fade and durable these Jammers are designed to withstand the test of time.Endurance +Speedo's toughest material offers 100 % chlorine resistance and high resistance to thread pulling and fading. Excellent comfort and wearability. The superlative in durability.