A boot-binding for board sports such as snowboarding is provided that is both automatically closing and compatible with any style of boot or shoe. A molded plastic shell which is fixedly attached to the board's upper surface provides a substantially boot-shaped receiving space and an automatic closing gate clamps down tightly across the boot's upper surface to bind the foot tightly. In operation, the rider simply steps into the binding thereby actuating a release mechanism which allows the gate to swing closed. Gate receptors mounted to the exterior of the plastic shell opposite the hinge accept and latch the gate firmly across boot's upper surface. Several cushioning elements, some of which may be inflatable, may be included and manual adjustments may be made without special tools to adjust the fit and feel of the binding.