Speedo Tech Panel Jammer Mens Look the part in training wearing the black Tech Jammer, featuring a geometric plastisol panel print in blue and yellow. A power mesh rubberised liner ensures you feel comfortable and supported during your swim, while the drawstring waist allows for an adjustable fit. Designed to be durable and better for the environment, the jammer is made from our new ECO Endurance+ fabric, which is 100% chlorine resistant, quick-drying and made from 50% recycled materials.