From training to race day, the Boom Splice Jammer from Speedo features a new signature print. Made from our Endurance®+ fabric, these men's jammers are perfect for fitness training and offers a comfortable fit thanks to its four way stretch technology. These jammers for men are designed to hug the contours of your body to create a hydrodynamic profile in the water. They may feel soft when they're on, but they're reassuringly secure too with their drawstring waist.

• Black woven polyester
• Shorts secured with drawstring elastic waistband
• Main: 53% polyester, 47% PBT polyester; lining: 100% polyester
• Machine wash at 30°C