We tested a mix of 12 wool and synthetic base layers to see which are guaranteed to keep you warm when temperatures drop. Two emerged as must-haves for this winter.

I've been cycling in base layers for over twenty years and testing them for Cyclingnews for two years solid. Whether it's summer or winter I always have a base layer on.

Midweight layers can also be worn under fleece jackets or heavier base layers in extreme cold. Heavyweight For very cold days, you want a base layer around 260+ gsm to give you maximum warmth.

Our Canada-based writer reveals the butt-warming base layers she wears to stay comfortable in freezing temps, including Uniqlo Heattech Leggings, Snag Woolies Merino Tights, REI Merino Base Layers ...

Synthetic base layers are typically less expensive than merino wool. They also have a smoother, silkier texture, making them more pleasant to wear directly against your skin. Moisture Management. A ...

Base layers suggest clothes that at least have the potential to be seen by others, while also implying some sort of hiking-skiing-climbing association.

Base layers — long underwear — are capable of adding considerable warmth. So, layering a pair under your jeans for a winter commute will help keep you warm.

But not all base layers are created equal. For the past three years, I’ve reviewed tops and bottoms for Outside’s Winter Buyer’s Guide, and while the options can seem endless, ...

In this article, we'll break down base layer weights and share a nifty trick to help you choose the right layer weight for your outdoor needs. The post This easy trick tells you which merino wool ...