A prosthetic device having first and second regions (12, 14) generally arranged from a first open end and a second closed end (34, 36) of the device and divided by a longitudinal anteroposterior plane extending between the first and second ends (34, 36), the device comprising: a single continuously knit elasticized fabric layer including a first set of yarns located about a circumference of the device through the first and second regions (12, 14), the fabric layer in the first region having a first elasticity, and the fabric layer in the second region having a second elasticity greater than the elasticity in the first region, the first and second regions coming radially closer to one another at the second end, and the first and second regions expanding radially away from one another as they approach the first end; an elastomeric layer securing to an interior surface of the fabric layer, the elastomeric layer being continuously defined along a length and the entire inner periphery of the fabric layer; wherein the device defines an arcuate profile along the longitudinal plane when the device is in flexion, characterized in that the first region has greater elasticity than the second region in the transverse direction, the fabric layer having a looser knit along the second region than the first region, the first and second regions (12, 14) sharing the same transverse or circumferential yarns extending circumferentially through both the first and second regions (12, 14) such that the first and second regions (12, 14) form a unitary and continuously knit construction with regions having different axial and transverse stiffness, the first region has a longitudinal elongation length in the range of 50%-70%, preferably 60%, and the second region has a longitudinal elongation length greater than the first region, the elastomeric layer being a solid mass of material molded to a shape, the elastomeric layer having a generally uniform axial elongation across both the first and second regions. a single continuously knit elasticized fabric layer including a first set of yarns located about a circumference of the device through the first and second regions (12, 14), the fabric layer in the first region having a first elasticity, and the fabric layer in the second region having a second elasticity greater than the elasticity in the first region, the first and second regions coming radially closer to one another at the second end, and the first and second regions expanding radially away from one another as they approach the first end; an elastomeric layer securing to an interior surface of the fabric layer, the elastomeric layer being continuously defined along a length and the entire inner periphery of the fabric layer; wherein the device defines an arcuate profile along the longitudinal plane when the device is in flexion, characterized in that the first region has greater elasticity than the second region in the transverse direction, the fabric layer having a looser knit along the second region than the first region, the first and second regions (12, 14) sharing the same transverse or circumferential yarns extending circumferentially through both the first and second regions (12, 14) such that the first and second regions (12, 14) form a unitary and continuously knit construction with regions having different axial and transverse stiffness, the first region has a longitudinal elongation length in the range of 50%-70%, preferably 60%, and the second region has a longitudinal elongation length greater than the first region, the elastomeric layer being a solid mass of material molded to a shape, the elastomeric layer having a generally uniform axial elongation across both the first and second regions.