Game Day Energy, Everyday Style. The BIKE Short Sleeve Practice Jersey is a vintage-inspired mesh jersey that combines throwback football vibes with a modern edge. Made from breathable polyester mesh, it’s built to keep you cool on the field, at the gym or in the streets. Sporty, sexy, and seriously iconic. Fabric: 100% Polyester Mesh. Performance: Lightweight, breathable mesh for an authentic athletic feel. Cut: Cropped cut for a vintage-inspired fit. Collar: Rib-knit collar for comfort and structure.