Synergizer Grey - For cycling road shoes, all ice skates, and women's lower heeled footwear (under 1").The Synergizer Grey Capsule features a thin profile and is designed for footwear where the heel is higher than the forefoot, specifically women's fashion and casual shoes with heels up to 1". It will also turn cycling shoes, stitched in-line and ice skates, and cowboy boots into the most comfortable ones you have ever worn.Rear-Foot Control Point:Only Superfeet provides this feature to control over-pronation, thus helping keep your foot correctly aligned. Result: less stress on muscles and joints.Mid-Foot Control Point:Another Superfeet original. This area stabilizes the mid-foot. Combined with Rear-Foot Control Point, this enables you to use your skeletal strength to your advantage. Result: a very stable foot, creating less muscle fatigue and more endurance.Patented Support Bridge:This feature activates all the control points for better balance and alignment during the stride. An ess