Vinyl-liner hauv av pas dej ua ke, uas tseem hu ua "cov pas dej ntim," yog tsim los siv cov khoom tseem ceeb xws li cov kauj ruam, braces, thiab phab ntsa panels.Cov khoom sib xyaw no tuaj yeem sib xyaw thiab sib xyaw ua ke los tsim cov qauv tsim tshwj xeeb, nyob ntawm koj qhov chaw sab nraum zoov thiab kev nyiam ntawm tus kheej.