Disclosed are thermal liners for protective garments and protective garments
that comprise thermal liners. In one embodiment, a thermal liner comprises an insulation
layer comprising a batt of entangled flame resistant fibers, the insulation layer
having a three-dimensional pattern that defines a plurality of closed-cell air
pockets that are configured to trap air to insulate a wearer of the thermal liner,
the insulation layer being shaped and configured for inclusion in the protective
garment and for donning by the wearer.