The Patagonia Insulated Boulder Fork Rain Jacket pairs a 3-layer H2No Performance Standard shell with 40-g recycled polyester insulation for alpine boulder sessions and cold, early-season fishing days. A PFAS-free DWR finish sheds water, the insulation stretches and breathes without turning clammy, and a single-pull hood, hook-and-loop cuffs, and drawcord hem seal out wind and rain. What Our Gearhead® Experts Are Saying:"I used to pack a rain shell and a warm layer separately, but this jacket keeps me dry and warm at once, so I'm not stopping to add another layer or just getting wet."