Abstract: An improved liner system for uninsulated waders is disclosed. Pant-like liners of various weights and insulating properties are configured for operative insertion within a lightweight uninsulated wader shell, particularly of the breathable type. The wearer can select that liner having the proper insulating properties for the use to which the waders will be put. A simple fastening system allows the liners to be rapidly installed and/or replaced in the waders. The liner fasteners are preferably placed adjacent the upper peripheral edge and the lower legging edges of the liner and mate with corresponding fasteners secured to the inside of the wader shell.