Whether it comes from a goose or it's synthetic, bottom line... down will keep you warmer than just about anything else on the market. Wear it under your shell for ultimate protection on frigid ski days or as an outerlayer when the temps rise and the sun is shining later in the season. Plus, unlike Marty McFly down predecessors that had you looking like the Michelin Man, these four down jackets look just as slick at aprés as they do on the hill:

1. OAKLEY UNIFICATION DOWN JACKET

$230

The Oakley Unification Down Jacket is perfect for those ULTRA cold days out on the mountain or in the backcountry. The Unification Down Jacket has 800 fill power, 80/20 Durable Water Repellent coating, making it one of the warmest clothing designs that Oakley makes.

2. PATAGONIA NANO PUFF® HYBRID JACKET

$249

The Nano Puff® Hybrid Jacket from Patagonia features synthetic insulation at the top of the jacket to keep your torso and upper arms toasty, while using high-loft, stretchy R2 fleece to help keep you mobile. Harness and pack compatible pockets and microfleece-lined chin also make it great for mountaineering.

3. HELLY HANSEN ODIN ISOLATOR JACKET

$280

The Odin Isolator Jacket from Helly Hansen is extremely warm and features PrimaLoft® to shed moisture and provides protection against bone-chilling wind. Warmth isn't it's only asset, the jacket also has a slick glossy look to it. Lastly, it tucks away easily in a backpack for perfect storage on the go.

4. HELLY HANSEN ODIN HOODED BELAY JACKET

$350

The Helly Hansen Odin Hooded Belay Jacket is extremely warm yet lightweight, protecting you without weighing you down. The Odin Hooded Belay Jacket features oversized stash hand warmer pockets, fully attached helmet compatible hood, draft stop inner skirt and includes a stuff sack to compress the jacket for easy storage.