Patagonia created the windproof Womens Lightweight R4 Jacket for cold-weather runs, spring backpacking trips, or summer mountain hikes. The jackets three-layer construction features a soft microfleece shell, a stretchy Polartec WindBloc laminate, and R1 grid fleece lining that simultaneously channels body heat and wicks moisture. Unlaminated R1 panel under the arms increase ventilation when youre moving fast, and a collar drawcord helps seal out chilly breezes and arctic blasts alike.