It’s the classic Patagonia fleece sweater. Its warm, fuzzy 300 weight Polartec fleece is comfortable to wear and very warm without being overly hot. The long chest zipper allows you to ventilate on warmer days. The marsupial style pass-through front pocket is where your hands will live on chillier days. As always, folks buy Patagonia because the fit is amazingly good, with excellent freedom of movement and because this classic will stay looking good for years to come.