Whether we hike the rolling hills of Appalachia or the towering granite peaks of the Sierra Nevada, we've all been promised blue skies by a weather app just to find ourselves thoroughly drenched while seeking any bit of shelter we can find. The Marmot Precip Eco Pro ensures that we'll never face that problem again, as long as we remember to toss it in our pack just in case. Luckily, the jacket is feather-light and easily packable, without giving up any performance, so we can withstand sudden downpours from passing storms. The zippered underarm vents and breathable material help keep us cool as we work up a sweat, and the mechanical stretch of the NanoPro material moves with us as we climb steep switchbacks and vault over fast-moving creeks. The incredible waterproofing keeps us dry and comfortable, and the fully taped seams ensure no drips sneak through to our baselayers