Streamlined, tech-inspired aesthetics. This sporty navy Muscleback features an abstract curved panel graphic in green and purple. The muscleback style offers flexibility during your fitness training and includes a medium neck and back opening, so you feel confident and secure as you move through your workout. Made from our durable Endurance+ fabric, it's quick-drying and 100% chlorine resistant. Plus, one of the yarns in the Endurance+ fabric is made from 100% post-consumer waste, such as recycled plastic bottles. 53% Recycled Polyester, 47% PBT Streamlined, tech-inspired aesthetics. This sporty navy Muscleback features an abstract curved panel graphic in green and purple. The muscleback style offers flexibility during your fitness training and includes a medium neck and back opening, so you feel confident and secure as you move through your workout. Made from our durable Endurance+ fabric, it's quick-drying and 100% chlorine resistant. Plus, one of the yarns in the Endurance+ fabric is made from 100% post-consumer waste, such as recycled plastic bottles.