Present aspects are directed to a ribbed structure of a knit sleeve that may provide ventilation, color-reveal qualities, curvature of a tailored sleeve shape, increased range of motion, and additional functional stability of the knit sleeve. Rib zones may be located along the knit sleeve so that various ribbing and venting components of each rib zone are automatically oriented near a particular portion of a wearer's arm. The rib zones may comprise a plurality of knitted ribs and a plurality of knitted vents, wherein the plurality of knitted vents are configured to move from a closed position to an open position in response to expansion and contraction of the plurality of knitted ribs.