A binding for water sports comprises a baseplate, which may optionally include a toe cup, and a heel cup. A heel loop is pivotably attached to the heel cup, and is pivotable between an upper position and a lower position to adjust the amount of support provided to the user's ankle. An adjustment control, for example a lever and cam mechanism pivotably attaches to the heel cup and is positioned such that the user can selectively move the cam portion between a release position wherein the heel loop is not supported in the upper position, and a support position wherein the heel loop is supported in the upper position. A flexible upper portion is attached to the base plate.