Winter Underwear - The Base Layer (Foundation)
 - Arctic / Antarctic, Cold Weather, Thermal Clothing

The base layer is the layer next to the skin, usually thought of as being underwear, or in cold climates, "thermal" underwear. Despite cold temperatures, perspiration is still a problem, in fact it can be more so than in a temperate climate. The body loses moisture at almost all times whether undergoing any great level of exertion or not. If there are numerous insulating layers keeping you warm, then it is more difficult for the perspiration to be able to escape. If the perspiration is not removed it will result in the wearer becoming uncomfortable and a feeling of "clamminess" as well as decreasing the efficiency of the insulating layers.

Underwear that is able to wick this moisture away from the skin surface therefore becomes much more important and this is an important factor in choosing garments. Modern "thermals" are made of synthetic fibers such and polypropylene or "fleece" that have good insulating properties and are also able to efficiently wick moisture away from the skin. Zips at the neck or even full length can help regulate temperature. A golden rule is to avoid cotton.

Cold Weather Underwear


Mountain Force Joy Shirt - Long-Sleeve - Women's
On sale - now $107.37 - was $178.95


Ortovox Rock N Wool Top - Long-Sleeve - Men's
$108.95


Arc'teryx RHO LTW Zip Neck Top - Women's
On sale - now $109.61 - was $128.95


Icebreaker BodyFit 200 Oasis Hooded Top - Men's
$110


Arc'teryx Rho LT Zip Neck Top - Women's
$118.95


Dynafit Thermal 1/2-Zip Shirt - Long-Sleeve - Men's
$129.95


Backcountry Lightweight Crew Neck Top - Men's
On sale - now $20.23 - was $44.95


Patagonia Capilene Daily Shirt - Short-Sleeve - Women's
On sale - now $21.75 - was $29


Patagonia Capilene Daily Tank Top - Women's
On sale - now $21.75 - was $29


Stoic Alpine Merino 150 Crew Shirt - Long-Sleeve - Women's
On sale - now $23.7 - was $79


Neff Base Layer Top - Long-Sleeve - Men's Palms
On sale - now $23.97 - was $39.95


Patagonia Capilene Daily Graphic T-Shirt - Short-Sleeve - Women's
On sale - now $27.3 - was $39


DAKINE Hillcrest Crew Top - Women's
On sale - now $29.22 - was $44.95


Patagonia Capilene Daily Shirt - Long-Sleeve - Women's
On sale - now $29.25 - was $39


Patagonia Capilene Lightweight Crew Shirt - Men's
On sale - now $34.3 - was $49


Burton AK Power Dry Crew - Short-Sleeve - Men's
On sale - now $34.97 - was $69.95


Spyder Captain Top - Men's
On sale - now $34.97 - was $69.95


Duckworth Maverick T-Shirt - Short-Sleeve - Women's
On sale - now $35.72 - was $64.95


Armada Contra Baselayer Crew - Long-Sleeve - Men's
On sale - now $35.97 - was $59.95


Icebreaker Siren Racerback Tank Top - Women's
On sale - now $36 - was $60


Spyder Styler Top - Women's
On sale - now $38.47 - was $69.95


Patagonia Capilene Lightweight Crew Top - Women's
On sale - now $39.2 - was $49


The North Face Light Crew Neck Top - Men's
$44.95


Norr Falketind Long Sleeve Top - Women's
On sale - now $45 - was $90


Icebreaker BodyFit 200 Oasis Crew - Short-Sleeve - Men's
On sale - now $48 - was $80


Black Crows Corpus Baselayer Top - Men's
On sale - now $49.47 - was $89.95


Spyder Skeleton Top - Men's
On sale - now $49.97 - was $99.95


Icebreaker BodyFit 150 Siren Sweetheart Top - Long-Sleeve - Women's
On sale - now $51.99 - was $79.99


Icebreaker BodyFit 150-Ultralite Anatomica V-Neck Shirt - Short-Sleeve - Men's
On sale - now $52.49 - was $69.99


Icebreaker BodyFit 200 Oasis Crew - Long-Sleeve - Women's
On sale - now $54 - was $90


Duckworth Maverick Zip-Neck Top - Men's
On sale - now $54.97 - was $99.95


Arc'teryx Phase AR Zip-Neck Top - Women's
On sale - now $55.26 - was $78.95


Arc'teryx Phase AR Crew - Long-Sleeve - Women's
On sale - now $56.21 - was $74.95


Arc'teryx Phase SL Zip Neck Top - Women's
On sale - now $59.21 - was $78.95


Patagonia Merino Lightweight Crew Top - Men's
On sale - now $59.25 - was $79


Helly Hansen Dry Charger 1/2-Zip Top - Men's
$59.95


Minus 33 Ticonderoga Lightweight Crew Top - Men's
$59.99


Icebreaker BodyFit 150-Ultralite Anatomica Tank Top - Men's
$60


Icebreaker Bodyfit 200 Lightweight Everyday Crewe Top - Short-Sleeve - Men's
$60


Icebreaker IKA Crew Top - Long-Sleeve - Men's
On sale - now $60 - was $100