Our Eagle Plains Jacket Liner is a warm layer that works equally well when worn as an outer layer or zipped into select Filson Jackets. For added versatility, it’s fully reversible with hand pockets available no matter which side faces out. The 100g PrimaLoft® Gold insulation traps body heat and retains 98% of its insulating ability if it gets wet. The cuffs and collar are wool-blend rib knit, for a custom fit and to seal out chilly breezes. Alaskan Guide flannel-lined hand pockets.