The men's Acto FL is a technical hooded hardfleece jacket, designed with a gridded backer that's bonded to an airy and water-resistant face fabric. Its Aerius Grid Loft fleece inner and stretch-woven exterior provide a combination of abrasion resistance and warmth, while still allowing air permeability, allowing sweat to escape. The Acto FL features a lightweight, windproof, and adjustable Tyono 30 StormHood, designed to provide protection in exposed conditions. A No Slip Zip™ front zipper prevents self-opening. The lower HemLock™ design prevents the jacket from slipping out from under a harness during climbs or hikes that feature dangerous ascents.