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Don't let the cold shut down your training.

Altra Wasatch Jacket ($199)

For snowy runs, a lightweight shell is essential. But it needn’t be overbuilt. The Wasatch—with its waterproof membrane, taped zippers that shed light snow, and ventilated armpits that breathe when you’re slogging uphill—hits the sweet spot.

Smartwool PhD Seamless Boxer Briefs ($48)

Merino wool and stretchy nylon make Smartwool’s Seamless ideal for layering under tights or pants. The nylon prevents bunching, and wool offers insulation and breathability for lung-busting jaunts in the cold.

JLab Audio Epic Air Earbuds ($150) 

Flexible silicone hooks and anatomically shaped gel tips held the Epic Air snugly in place. Lack of wires made it easy to wear a single earbud while keeping the other side free to pick up oncoming snowplows.

Ibex VT Hoodie ($135) 

The 100 percent merino VT wicks moisture, never smells, and works as either a midlayer under a vest or a base layer under a jacket. It’s so versatile, you might not take it off all winter. (We didn’t.)

Feetures Elite Light Cushion Socks ($18) 

These Elites are comfy—no bulky toe seam—and come with a lifetime guarantee. Add them to your kit if you’re tired of blowing through expensive running socks.

Salomon S-Lab Sense Ultra 5 Hydration Vest ($140) 

Hands down our favorite vest for long runs in any conditions. Its two bottles compress when empty, and two front pockets mean layers and food are at hand and close to the body for less bouncing and jostling.

Black Diamond Sprinter Rechargeable Headlamp ($80)

At 200 lumens, the Sprinter lights up trails on evening jogs, while the battery pack helps it stay balanced on your head. Rear red lights make you visible to cars.

The North Face Runners 2 Etip Gloves ($30)

Touchscreen compatibility on these fleece gloves allows you to swipe a smartphone or watch without exposing your digits to the chill.

Sunday Afternoon Elements II Cap ($32) 

The two-inch brim and microfleece earflaps on this wind- and water-resistant hat block snow and keep ears warm.

Brooks Women’s Threshold Pants ($90) 

A functional choice for cold days, the midweight Threshold should be in every runner’s closet. We especially like its low-profile zip pockets and soft poly-spandex lining.