Replacement liners for Hoffman Felt Pac boots. Choose FLINE-10 for 10″ Felt Pac boots (L13-10, L14EH-10) or FLINE-14 for 14″ Felt Pac boots (L13-14, L13-14). For Thinsulate 14″ Felt Pac boots, choose TLINE.9 mm removable polypropylene? Hoffman felt pac boot liner for maximum warmth.