A support member for a plantar surface of a foot, comprising: a heel support plate that includes a heel lateral wing and a heel medial wing, wherein the heel lateral wing extends from a lateral side of the heel support plate and the heel medial wing extends from a medial side of the heel support plate; a forefoot support plate that includes a forefoot lateral wing and a forefoot medial wing, wherein the forefoot lateral wing extends from a lateral side of the forefoot support plate and the forefoot medial wing extends from a medial side of the forefoot support plate; and a strap system, wherein the strap system includes an ankle strap, a lateral heel strap and a medial heel strap, and wherein the strap system is configured such that, when the article is worn by the human wearer, the ankle strap completely surrounds and is secured to the wearer's ankle, the lateral heel strap extends from under a wearer's lateral malleolus to a lateral anchor location under a heel of the wearer's foot, and the medial heel strap extends from under a wearer's medial malleolus to a medial anchor location under the heel of the wearer's foot, wherein the heel lateral wing overlaps the forefoot lateral wing and the forefoot medial wing overlaps the heel medial wing, and wherein interaction of the wings of the heel support plate and the forefoot support plate allows the heel support plate to rotate internally with respect to the forefoot support plate and limit the heel support plate from rotating externally beyond a predetermined extent with respect to the forefoot support plate. a heel support plate that includes a heel lateral wing and a heel medial wing, wherein the heel lateral wing extends from a lateral side of the heel support plate and the heel medial wing extends from a medial side of the heel support plate; a forefoot support plate that includes a forefoot lateral wing and a forefoot medial wing, wherein the forefoot lateral wing extends from a lateral side of the forefoot support plate and the forefoot medial wing extends from a medial side of the forefoot support plate; and a strap system, wherein the strap system includes an ankle strap, a lateral heel strap and a medial heel strap, and wherein the strap system is configured such that, when the article is worn by the human wearer, the ankle strap completely surrounds and is secured to the wearer's ankle, the lateral heel strap extends from under a wearer's lateral malleolus to a lateral anchor location under a heel of the wearer's foot, and the medial heel strap extends from under a wearer's medial malleolus to a medial anchor location under the heel of the wearer's foot, the ankle strap completely surrounds and is secured to the wearer's ankle, the lateral heel strap extends from under a wearer's lateral malleolus to a lateral anchor location under a heel of the wearer's foot, and the medial heel strap extends from under a wearer's medial malleolus to a medial anchor location under the heel of the wearer's foot, wherein the heel lateral wing overlaps the forefoot lateral wing and the forefoot medial wing overlaps the heel medial wing, and wherein interaction of the wings of the heel support plate and the forefoot support plate allows the heel support plate to rotate internally with respect to the forefoot support plate and limit the heel support plate from rotating externally beyond a predetermined extent with respect to the forefoot support plate.