Key pieces to keep you going when the mercury drops.
New Balance Chameleon jacket
With highly breathable Polartech Alpha insulation in the front and back and a stretchy polyester weave that allows airflow throughout the sides, this is the ideal active layer for frigid days. $150, newbalance.com
Brooks Pulse Lite Glove II
Brooks makes warmer gloves, but we loved the breathable Pulse Lite ($25) for all but the coldest days on the trail. Reflective highlights up the viz at night, and the touchscreen-compatible pointer finger allows you to switch tunes without slowing down.
Dakine Heather beanie
This insulated acrylic hat is so comfortable that we wore it running, camping, skinning, and mountain biking. To maintain the handmade look, don’t throw it in the washing machine. $30, dakine.com
Helly Hansen Pace Half Zip Lifa Flow midlayer
It feels too thin for winter, but its purpose is to keep you warm by keeping you dry: polyester mesh on the back panel and under the armpits pulls heat and sweat away from the skin. $70, hellyhansen.com
Most running crampons are heavy, clunky, or both. At 7.5 ounces per pair, the NanoSpikes ($50) are the lightest we’ve tested. Low-profile tungsten-carbide studs bite into ice and snow but won’t gash your calf if you make a misstep.
SmartWool PhD Run Tech tights
Sure, they’re pricey, but the form-fitting comfort is worth it. The mix of merino wool, nylon, and stretchy spandex kept us toasty down to the teens. $125, smartwool.com
Fits Pro Trail socks
The cuff on the Pro Trail ($18) sock hits the low calf—high enough to keep out snow, but not so high that it feels bulky under tights. And with a wee bit of Lycra added to the merino wool and nylon weave, it stays put.
Moving Comfort FineForm bra
With a new uni-cup design and sexy straps, the FineForm ($50) lives up to its name: it’s more feminine and flattering than most active bras but still supportive enough for larger sizes and serious interval training.
Under Armour Pure Stretch underwear
These laser-cut, hem-free undies make panty lines obsolete. Better still, they’re soft, stretchy, and moisture-wicking. One size fits most—seriously. $12, underarmour.com