After testing 50 jackets for this review, we can confidently declare: Storm shells are back. Advances in fabric technology have spurred a whole new breed of winter shells that are light and easy to pack, repel the worst weather, and are comfortable in a wide range of conditions. If that doesn't describe your jacket, perhaps it's time for an upgrade.

Cloudveil Koven Plus (1.3 lbs, M) $440 cloudveil.com

1. This is simply the most adapt-able winter-specific storm shell we tested. The key is Schoeller's new waterproof-breathable fabric with c_change technology, a membrane with a polymer structure that opens up when you get hot and contracts when you cool down. Translation: Testers didn't overheat when their buddies did on a spring slog, yet they stayed warmer while riding the lift.

2. The Koven Plus became our go-to jacket whether we were pounding out backcountry laps, ice-climbing in Rocky Mountain National Park, or tagging fourteeners in spring. Credit the use of stretchy fabric in high-mobility areas, stitch-free construction, precision-shaped fleece patches on the back and collar, and a trim, athletic cut suited to dynamic movements like tele turns.

3. A 21st-century storm shell must be versatile—especially if it costs more than a night at Yosemite's Ahwahnee Hotel. The Koven Plus delivered: Thanks to the adaptability of the fabric and the trim fit, as well as details like a perfectly sculpted hood and easy-to-reach pit zips, testers rated it tops for powder days, ice climbs, resort laps, and waiting around for their buddies to catch up.