Running Equipment ASICS Men’s Rival II Singlet Review January 23, 2019 ElectricOctopus 0 Comments ASICS, Exercise & Fitness, Men, Sports & Fitness, Sports & Outdoors 100% Polyester Imported Machine Wash Lightweight and breathable Binding at neckline and Armholes Side seam pulled forward so no chaffing under arms Our rival II singlet merges lightweight fabrics with breathability to help your performance on the track feel effortless.