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 & 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 & hem for weight reduction & comfort. Internal goggle wipe keeps your eye protection clean. Wear over the LS jersey or as is.