"What Our Gearhead® Experts Are Saying: ""What I like most about the Terra Peak Jacket is how versatile it is. It’s got great warmth-to-weight thanks to the THERMOBALL fill, and the fit is slim enough to layer under a shell but still works as a standalone piece. The stretch gussets make a big difference when I'm hiking or moving fast.""The Women’s Terra Peak Jacket is built for lightweight performance when the forecast is cool, unpredictable, or anywhere in between. From morning hikes to alpine basecamps, this technical insulator blends THERMOBALL warmth with low-profile mobility and packability. The Pertex Quantum ripstop shell is light and strong, while post-consumer recycled synthetic insulation keeps us warm even in damp conditions. With underarm gussets for mobility and stretch-knit cuffs with FlashDry to wick away sweat, the Terra Peak is tuned for fast-moving mountain missions. It stows neatly into its own chest pocket for easy packing and works equally well as a daily insulator or active midlayer. Clean lines, a stand collar, and slim fit complete a look that moves just as well off the trail as it does on it."