Latest base layers news
Columbia Omni-Heat Midweight Baselayer Crew review: a revolutionary first layer for icy adventures
A reflective lining improves the performance of this comfortable base layer
What is thermal underwear and do you really need it?
What is thermal underwear? We respond to all your questions about this winter essential, from what to look for and how to wear it to stay toasty and dry
Jack Wolfskin Seamless Wool Long Sleeve review: a light yet warm base layer you'll forget you're even wearing
This merino wool blend layer is one of the lightest we've tested on the mountain
The best base layers 2025: the foundation of your hiking garb
The best base layers, from merino and bamboo to synthetic and hybrid tops, to keep you warm on your adventures – tested by experts
Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve review: pricey but worth it
A luxuriously comfortable year-round-useful merino base layer
Smartwool Men’s Active Mesh Short Sleeve T-shirt review: you get what you pay for, and you pay a lot
The super-comfortable, high-stretch Smartwool Men’s Active Mesh Short Sleeve T-shirt boasts mesh vents and environmentally friendly materials
Saxx Roast Master Mid-Weight Long Sleeve base layer review: the cozy warmth of recycled fibers
A super-comfortable base layer, the Saxx Roast Master Mid-Weight is made from a mix of recycled plastic and wood fibers, which offers decent thermal protection
Columbia Tunnel Springs Wool Tights review: premium thermal protection for legs
These mostly merino Columbia Tunnel Springs Wool Tights base-layer bottoms keep your legs warm through winter
