An article of footwear having an upper and a sole structure secured to the upper, the sole structure comprising: a) a sole component including i) a bladder formed from a polymer barrier that encloses a pressurized fluid, the bladder having at least a first surface positioned adjacent the upper, an opposite second surface, and a sidewall extending between the first surface and the second surface, the sidewall forming a depression and defining an indented area adjacent the second surface, and ii) a reinforcing structure secured to an exterior of the bladder, the reinforcing structure having an upper portion, a lower portion, and a connecting portion extending between the upper portion and the lower portion, the connecting portion being positioned in the depression, and the material forming the reinforcing structure having a greater modulus of elasticity than the material forming the bladder; b) a polymer foam material extending between the bladder and the upper, an upper surface of the polymer foam material being bonded to the upper, and a lower surface of the polymer foam material being bonded to the sole component; and c) an outsole secured to the second surface, at least one side portion of the outsole extending into the indented area and being bonded to the sidewall. a) a sole component including i) a bladder formed from a polymer barrier that encloses a pressurized fluid, the bladder having at least a first surface positioned adjacent the upper, an opposite second surface, and a sidewall extending between the first surface and the second surface, the sidewall forming a depression and defining an indented area adjacent the second surface, and ii) a reinforcing structure secured to an exterior of the bladder, the reinforcing structure having an upper portion, a lower portion, and a connecting portion extending between the upper portion and the lower portion, the connecting portion being positioned in the depression, and the material forming the reinforcing structure having a greater modulus of elasticity than the material forming the bladder; i) a bladder formed from a polymer barrier that encloses a pressurized fluid, the bladder having at least a first surface positioned adjacent the upper, an opposite second surface, and a sidewall extending between the first surface and the second surface, the sidewall forming a depression and defining an indented area adjacent the second surface, and ii) a reinforcing structure secured to an exterior of the bladder, the reinforcing structure having an upper portion, a lower portion, and a connecting portion extending between the upper portion and the lower portion, the connecting portion being positioned in the depression, and the material forming the reinforcing structure having a greater modulus of elasticity than the material forming the bladder; b) a polymer foam material extending between the bladder and the upper, an upper surface of the polymer foam material being bonded to the upper, and a lower surface of the polymer foam material being bonded to the sole component; and c) an outsole secured to the second surface, at least one side portion of the outsole extending into the indented area and being bonded to the sidewall.