What Our Gearhead(R) Experts Are Saying:"I brought the Summit Step Full-Zip on a long ridge push where every ounce in the pack mattered, and I barely noticed I had it on until the wind picked up near the summit. It packed down small enough that ditching it for the descent wasn't even a thought."Long climbs punish anything extra, and the Summit Step Full-Zip Jacket from Columbia's Titanium line is built with that math in mind, warmth that doesn't cost a single labored breath on the steep sections. This is the layer for the hiker counting ounces before counting miles. Omni-Wick pulls sweat to the surface so the fabric dries fast even as the pace climbs, and thumbholes at the cuffs hold sleeves in place while adding coverage when the wind shifts. Stretch binding at the cuffs and hem locks out drafts without adding bulk, keeping the whole jacket light enough to forget until the temperature says otherwise.