An article of footwear comprising: a sole structure including forefoot and hindfoot regions, wherein the forefoot and hindfoot regions are respectively configured for location under a forefoot and a hindfoot when the article is worn by a human wearer; an upper comprising a forefoot upper part coupled to a forefoot region of the sole structure and configured to substantially cover sides and a top of the forefoot when the article is worn by the human wearer; and a strap system, wherein the strap system includes an ankle strap, a lateral heel strap and a medial heel strap, wherein the strap system is asymmetric in that the lateral heel strap is shorter and more rearward than the medial heel strap, wherein a front portion of the ankle strap is configured to be connected and unconnected 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 ankle, the lateral heel strap extends from under a wearer lateral malleolus to a lateral anchor location under a heel of the wearer foot, the medial heel strap extends from under a wearer medial malleolus to a medial anchor location under the heel of the wearer foot, the lateral anchor location lies inside the outer perimeter of the wearer foot perimeter on the lateral side and under the lateral front part of the heel fat pad, and the medial anchor location lies inside the outer perimeter of the wearer foot perimeter on the medial side and under the medial front part of the heel fat pad, wherein: the upper includes an inner element and an outer element, the outer element covers substantially all of the forefoot, substantially all of a midfoot and portions of the hindfoot when the article is worn by the human wearer, the inner element covers substantially the entire wearer foot when the article is worn by the human wearer, the strap system is part of the inner element, and the inner element is movable within the outer element. a sole structure including forefoot and hindfoot regions, wherein the forefoot and hindfoot regions are respectively configured for location under a forefoot and a hindfoot when the article is worn by a human wearer; an upper comprising a forefoot upper part coupled to a forefoot region of the sole structure and configured to substantially cover sides and a top of the forefoot when the article is worn by the human wearer; and a strap system, wherein the strap system includes an ankle strap, a lateral heel strap and a medial heel strap, wherein the strap system is asymmetric in that the lateral heel strap is shorter and more rearward than the medial heel strap, wherein a front portion of the ankle strap is configured to be connected and unconnected 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 ankle, the lateral heel strap extends from under a wearer lateral malleolus to a lateral anchor location under a heel of the wearer foot, the medial heel strap extends from under a wearer medial malleolus to a medial anchor location under the heel of the wearer foot, the lateral anchor location lies inside the outer perimeter of the wearer foot perimeter on the lateral side and under the lateral front part of the heel fat pad, and the medial anchor location lies inside the outer perimeter of the wearer foot perimeter on the medial side and under the medial front part of the heel fat pad, the ankle strap completely surrounds and is secured to the wearer ankle, the lateral heel strap extends from under a wearer lateral malleolus to a lateral anchor location under a heel of the wearer foot, the medial heel strap extends from under a wearer medial malleolus to a medial anchor location under the heel of the wearer foot, the lateral anchor location lies inside the outer perimeter of the wearer foot perimeter on the lateral side and under the lateral front part of the heel fat pad, and the medial anchor location lies inside the outer perimeter of the wearer foot perimeter on the medial side and under the medial front part of the heel fat pad, wherein: the upper includes an inner element and an outer element, the outer element covers substantially all of the forefoot, substantially all of a midfoot and portions of the hindfoot when the article is worn by the human wearer, the inner element covers substantially the entire wearer foot when the article is worn by the human wearer, the strap system is part of the inner element, and the inner element is movable within the outer element. the upper includes an inner element and an outer element, the outer element covers substantially all of the forefoot, substantially all of a midfoot and portions of the hindfoot when the article is worn by the human wearer, the inner element covers substantially the entire wearer foot when the article is worn by the human wearer, the strap system is part of the inner element, and the inner element is movable within the outer element.