A bladder system for an article of footwear, comprising: a sole structure including an outer bladder bounding an interior cavity; the outer bladder including a first portion and a second portion; at least one support structure disposed inside the interior cavity, wherein the at least one support structure is an inner bladder (1804, 1806); a valve member disposed inside the interior cavity, the valve member providing fluid communication between the interior cavity and an exterior of the outer bladder; and wherein the at least one support structure provides a substantially constant shape for the second portion of the outer bladder and wherein the valve member provides a substantially constant shape for the first portion of the outer bladder; and wherein the interior cavity has a boundary surface that includes an upper layer (220, 1802) and a lower layer (222, 1802) wherein the valve member includes a first surface (261, 1820) that is forwardly oriented, a generally flat second surface (262, 1820) that is rearwardly oriented and extends from the upper layer to the lower layer, a third surface (263, 1820) that is on a medial side of the valve member, a fourth surface (264, 1820) that is on a lateral side of the valve member, and a fifth surface (265, 1820) that is a lower surface and faces downward, and wherein the first surface (261, 1820) is contoured and is disposed against the upper layer in the first portion of the outer bladder, the first surface provides a contoured shape for the first portion of the outer bladder, and a height of the first surface tapers from the second surface to the fifth surface. a sole structure including an outer bladder bounding an interior cavity; the outer bladder including a first portion and a second portion; at least one support structure disposed inside the interior cavity, wherein the at least one support structure is an inner bladder (1804, 1806); a valve member disposed inside the interior cavity, the valve member providing fluid communication between the interior cavity and an exterior of the outer bladder; and wherein the at least one support structure provides a substantially constant shape for the second portion of the outer bladder and wherein the valve member provides a substantially constant shape for the first portion of the outer bladder; and wherein the interior cavity has a boundary surface that includes an upper layer (220, 1802) and a lower layer (222, 1802) wherein the valve member includes a first surface (261, 1820) that is forwardly oriented, a generally flat second surface (262, 1820) that is rearwardly oriented and extends from the upper layer to the lower layer, a third surface (263, 1820) that is on a medial side of the valve member, a fourth surface (264, 1820) that is on a lateral side of the valve member, and a fifth surface (265, 1820) that is a lower surface and faces downward, and wherein the first surface (261, 1820) is contoured and is disposed against the upper layer in the first portion of the outer bladder, the first surface provides a contoured shape for the first portion of the outer bladder, and a height of the first surface tapers from the second surface to the fifth surface.