The sweater worn by the Dude is NOT a Cowichan but a Westerley made by Pendleton. It's machine knit and uses much thinner, more regular wool than the heavy lanolin type used by the Cowichan hand knitters. The makers of the Westerley also say the pattern was "inspired" by Cowichan motifs (read "ripped off"). Pendletons are nowhere near as water resistant as the real thing.