R-Core Concept is applying experience while redefining standards to yield different results. When every split-second counts, an aerodynamic fit can make that difference. When paired up with the R-Core X pant, the R-Core Concept combo offers maximum mobility in the riding position. The two-piece unit starts with a poly/spandex long sleeve stretchable body topped off with a lightweight bib for an aerodynamic fit and increased ventilation with full range of motion. FEATURES Polyester/spandex mesh fabric to reduce body temperature. Moisture management & anti microbial properties. Aerodynamic chassis. Fade-resistent sublimated graphics. Silicone heat transfers. Taped neckline, arm holes and hem for weight reduction and comfort. Internal goggle wipe keeps your eye protection clean. Wear over the LS jersey or as is.