An article of footwear having an upper (10, 34, 504) and a sole structure associated thereto, the upper (10, 34, 504) forming a void, the upper (10, 34, 504) comprising: a knitted component (34, 100, 300, 350, 508) having a first exterior surface (42, 208, 560) and a second interior surface (38, 114, 552), wherein the knitted component (34, 100, 300, 350, 508) comprises at least one integrally knitted cushion region (54, 112, 302, 354, 548) located on the second interior surface (38, 114, 552); wherein the cushion region (54, 112, 302, 354, 548) comprises a plurality of non-planar structures (46, 70, 122, 304, 358, 550, 556) that project away from the second interior surface (38, 114, 552) of the knitted component (34, 100, 300, 350, 508) by at least 1mm into the void; wherein the cushion region (54, 112, 302, 354, 548) is located in a rearfoot region (22, 528) of the upper (10, 34, 504) such that the non-planar structures (46, 70, 122, 304, 358, 550, 556) are configured to contact a wearer's heel, wherein the knitted upper (10, 34, 504) comprises a tension zone (72, 74, 136, 138, 580, 588) configured to pull the cushion region (54, 112, 302, 354, 548) against the wearer's heel, wherein the tension zone (72, 74, 136, 138, 580, 588) is connected to the cushion region (54, 112, 302, 354, 548) through one or more courses of yarn, wherein the plurality of non-planar structures (46, 70, 122, 304, 358, 550, 556) comprises tubular rib structures, wherein the article of footwear is characterized in that the tension zone (72, 74, 136, 138, 580, 588) comprises one or more elasticated yarns, wherein the plurality of tubular non-planar structures (46, 70, 122, 304, 358, 550, 556) are knitted in a closely-spaced parallel array, and wherein each tubular non-planar structure (46, 70, 122, 304, 358, 550, 556) is oriented vertically and parallel to a heel centerline (58, 124, 576) of the knitted component (34, 100, 300, 350, 508). a knitted component (34, 100, 300, 350, 508) having a first exterior surface (42, 208, 560) and a second interior surface (38, 114, 552), wherein the knitted component (34, 100, 300, 350, 508) comprises at least one integrally knitted cushion region (54, 112, 302, 354, 548) located on the second interior surface (38, 114, 552); wherein the cushion region (54, 112, 302, 354, 548) comprises a plurality of non-planar structures (46, 70, 122, 304, 358, 550, 556) that project away from the second interior surface (38, 114, 552) of the knitted component (34, 100, 300, 350, 508) by at least 1mm into the void; wherein the cushion region (54, 112, 302, 354, 548) is located in a rearfoot region (22, 528) of the upper (10, 34, 504) such that the non-planar structures (46, 70, 122, 304, 358, 550, 556) are configured to contact a wearer's heel, wherein the knitted upper (10, 34, 504) comprises a tension zone (72, 74, 136, 138, 580, 588) configured to pull the cushion region (54, 112, 302, 354, 548) against the wearer's heel, wherein the tension zone (72, 74, 136, 138, 580, 588) is connected to the cushion region (54, 112, 302, 354, 548) through one or more courses of yarn, wherein the plurality of non-planar structures (46, 70, 122, 304, 358, 550, 556) comprises tubular rib structures, wherein the article of footwear is characterized in that the tension zone (72, 74, 136, 138, 580, 588) comprises one or more elasticated yarns, wherein the plurality of tubular non-planar structures (46, 70, 122, 304, 358, 550, 556) are knitted in a closely-spaced parallel array, and wherein each tubular non-planar structure (46, 70, 122, 304, 358, 550, 556) is oriented vertically and parallel to a heel centerline (58, 124, 576) of the knitted component (34, 100, 300, 350, 508).