Abstract: An inflatable liner for a boot, such as a snowboard boot. An oily chalk like substance consisting of 90% sweet starch, 9% lubricant, and 1% stearate is included between two sheets of plastic that make up bladder of the liner. The bladder is attached to the EVA of the liner before the EVA is folded, stitched, heated and molded. This allows the bladder to be attached while the EVA is still flat and allows attachment to be performed by machine stitching. The bladder is partially iflated before the EVA is heated and molded. The oily chalk like substance and the partial inflation of the bladder allows the installed baldder to apss through the heating and molding steps of the EVA without the two sheets that make up the bladder melting together. The design and installation of the bladder minimizes the amount of slipping of a wearer's foot and heal within the boot.

Abstract: A removable snowboard boot liner made from Ethyl Vinyl Acetate with an air bladder attached therein and a method of mass producing such liners. An oily chalk like substance consisting of 90% sweet starch, 9% lubricant and 1% stearate is included between the two sheets that make up the bladder. The bladder is attached to the EVA before the EVA is folded, stitched, heated and molded. This allows the bladder to be attached while the EVA is still flat and allows the attachment to be performed by machine stitching. The bladder is partially inflated before the EVA is heated and molded. The oily chalk like substance and the partial inflation of the bladder allows the installed bladder to pass through the heating and molding steps of the EVA without the two sheets that make up the bladder melting together. The invention also consists of a design and installation of the bladder that minimizes the amount of slipping of a wearer's foot and heal within the boot.