What?s the main difference between this and the jacket?
DAVID W I don't own the jacket so I can't say. However, the "sweater" is pretty warm and wears like a jacket. The inside of the sweater is lined like a windbreaker type jacket and the outside is sort of furry ( like a hook rug if you know what hook rugs feel like). Someone described the outside as reminding them of a character from the movie MONSTERS INC. !
Hope this helps.....
JOHN K If you want a technically sound answer, I would go to the patagonia website and chat with one of their sales people. They are super friendly and knowledgeable.