Icebreaker Boot Blanket Large Mossy Oak Breakup Insulated over boots have a poly cotton outer shell. Features a rear zipper for easy on easy off and a draw cord for a snug fit above boot.. Nylon inner shell with slip resistant vinyl sole. 2 ply Hollofil 808 insulation. Color: Mossy Oak BreakUp. Made in China. Model Number: BK-840-LG.