Classic sports styling, straight from the Speedo archives. The sporty black HyperBoom Laneback is finished with contrast straps and a stripe of iconic Boom logos. The Laneback design offers flexibility during training, so you can keep pushing the pace. A bust shelf liner lends light support, minimising distractions. Be ready to go again in our quick-drying Endurance+ fabric, designed for durability with high chlorine resistance. Body made of 53% Recycled Polyester, 47% PBT. Endurance+ Fabric: Body made of 53% Recycled Polyester, 47% PBT. Recycled polyester yarns are made from 100% post-consumer waste, such as recycled plastic bottles, with high chlorine resistance and quick dry Light bust support featuring our classic bust shelf liner to keep your bust in place Racerback design aids shoulder movement and offers increased back coverage Medium leg Bust shelf and gusset liner made from 100% recycled polyester