Patagonia’s own version of water-resistant down ups the ante by boosting loft to an astonishing 1,000-fill. They zap 800-fill down with radio waves until its molecular structure changes, allowing the plumes to accept a silicone DWR treatment without the use of chemical binders. The coating augments and strengthens the loft too, supercharging the fill power. The jacket is differentially cut (outer shell fabric is larger than the inner lining, so it molds around your body) and baffled (no sewnthrough seams). Testers from Vermont to Colorado used it in bone-cracking cold, from ice climbing to skiing to mountaineering, and all proclaimed it to be the most instantly warm jacket they’ve used. “It heated my core so effectively that warm blood even thawed my wooden hands.” The Encapsil is limited edition (only 1,000 jackets), but Patagonia plans to expand the line in the fall.