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

The base layer is the layer next to the skin 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. A golden rule is to avoid cotton.

Men's Long Underwear - Bottoms
more

Calvin Klein Underwear - Linear Long Johns (Cobalt Water/Black Stripe) Men
Calvin Klein Underwear - Linear Long Johns (Cobalt Water/Black Stripe) Men's Underwear
On sale - now $20.99 - was $42.5

MyPakage Weekday First Layer Print Long Underwear - Men
MyPakage Weekday First Layer Print Long Underwear - Men's
On sale - now $27.47 - was $54.95

Men
Men's 2(X)Ist Cotton Long Underwear
$30

Men
Men's 2(X)Ist Cotton Long Underwear, Burgundy
$30

Men
Men's 2(X)Ist Cotton Long Underwear, Grey
$30

2(X)IST - Essentials Long Underwear (Black) Men
2(X)IST - Essentials Long Underwear (Black) Men's Casual Pants
$30

2(X)IST - Essentials Long Underwear (Charcoal) Men
2(X)IST - Essentials Long Underwear (Charcoal) Men's Casual Pants
$30

2(X)IST - Essentials Long Underwear (White) Men
2(X)IST - Essentials Long Underwear (White) Men's Casual Pants
$30

Calvin Klein Underwear - Linear Long Johns (Ignite Red/Black Stripe) Men
Calvin Klein Underwear - Linear Long Johns (Ignite Red/Black Stripe) Men's Underwear
On sale - now $34.99 - was $42.5

Women's Long Underwear - Bottoms
more

Hanro - Woolen Silk Pant 1422 (Black) Women
Hanro - Woolen Silk Pant 1422 (Black) Women's Underwear
$130

Hanro - Woolen Silk Pant 1422 (Cozy Blue) Women
Hanro - Woolen Silk Pant 1422 (Cozy Blue) Women's Underwear
$130

Hanro - Woolen Silk Pant 1422 (Cygne) Women
Hanro - Woolen Silk Pant 1422 (Cygne) Women's Underwear
$130

Hot Chillys - Peach Print Bottom (Silver Cheetah) Women
Hot Chillys - Peach Print Bottom (Silver Cheetah) Women's Outerwear
On sale - now $18 - was $60

Hot Chillys - Mtf 4000 Ankle Tight (White) Women
Hot Chillys - Mtf 4000 Ankle Tight (White) Women's Outerwear
On sale - now $19.99 - was $50

Hot Chillys - Peach Print Bottom (Copper Cheetah) Women
Hot Chillys - Peach Print Bottom (Copper Cheetah) Women's Outerwear
On sale - now $24.99 - was $60

Hot Chillys - Peach Print Bottom (Snow Leopard) Women
Hot Chillys - Peach Print Bottom (Snow Leopard) Women's Outerwear
$45

Hot Chillys - Peach Print Bottom (Tiger) Women
Hot Chillys - Peach Print Bottom (Tiger) Women's Outerwear
$45

Hot Chillys - MTF Sublimated Print Tight (Garden Party) Women
Hot Chillys - MTF Sublimated Print Tight (Garden Party) Women's Outerwear
On sale - now $45.55 - was $65

Men's Long Underwear - Tops
more

SmartWool Midweight Pattern Crew - Men
SmartWool Midweight Pattern Crew - Men's
$104.95

Hot Chillys - Micro-Elite Chamois 8K Zip-T (Granite) Men
Hot Chillys - Micro-Elite Chamois 8K Zip-T (Granite) Men's T Shirt
On sale - now $19.99 - was $65

Hot Chillys - Micro-Elite Chamois 8K Zip-T (Black) Men
Hot Chillys - Micro-Elite Chamois 8K Zip-T (Black) Men's T Shirt
On sale - now $39.99 - was $65

Hot Chillys - Micro-Elite Chamois 8K Zip-T (White) Men
Hot Chillys - Micro-Elite Chamois 8K Zip-T (White) Men's T Shirt
On sale - now $39.99 - was $65

Hot Chillys - Peach Solid Crewneck (Black) Men
Hot Chillys - Peach Solid Crewneck (Black) Men's Long Sleeve Pullover
$40

Hot Chillys - Peach Solid Crewneck (Charcoal) Men
Hot Chillys - Peach Solid Crewneck (Charcoal) Men's Long Sleeve Pullover
$40

Hot Chillys - Peach Solid Crewneck (White) Men
Hot Chillys - Peach Solid Crewneck (White) Men's Long Sleeve Pullover
$40

Hot Chillys - Peach Solid Roll T-Neck (Black) Men
Hot Chillys - Peach Solid Roll T-Neck (Black) Men's Long Sleeve Pullover
$45

Hot Chillys - Peach Solid Roll T-Neck (Charcoal) Men
Hot Chillys - Peach Solid Roll T-Neck (Charcoal) Men's Long Sleeve Pullover
$45

Women's Long Underwear - Tops
more

Hot Chillys - Peach Print Crewneck (Silver Cheetah) Women
Hot Chillys - Peach Print Crewneck (Silver Cheetah) Women's Clothing
On sale - now $18 - was $60

Hot Chillys - Peach Print Crewneck (Totem/Black) Women
Hot Chillys - Peach Print Crewneck (Totem/Black) Women's Clothing
On sale - now $20.99 - was $45

Hot Chillys - Peach Print Crewneck (Primitive Pop/Black) Women
Hot Chillys - Peach Print Crewneck (Primitive Pop/Black) Women's Clothing
On sale - now $22.99 - was $45

Hot Chillys - Peach Print Crewneck (Copper Cheetah) Women
Hot Chillys - Peach Print Crewneck (Copper Cheetah) Women's Clothing
On sale - now $24.99 - was $60

Hot Chillys - Micro-Elite Chamois Sublimated Print Crewneck (Abalone/Black) Women
Hot Chillys - Micro-Elite Chamois Sublimated Print Crewneck (Abalone/Black) Women's T Shirt
On sale - now $24.99 - was $60

Hot Chillys - Micro-Elite Chamois Sublimated Print Crewneck (Early Spring/White) Women
Hot Chillys - Micro-Elite Chamois Sublimated Print Crewneck (Early Spring/White) Women's T Shirt
On sale - now $24.99 - was $60

Hot Chillys - MTF Sublimated Print Scoop Neck Top (Hollywood/Black) Women
Hot Chillys - MTF Sublimated Print Scoop Neck Top (Hollywood/Black) Women's T Shirt
On sale - now $24.99 - was $55

Hot Chillys - MTF Sublimated Print Scoop Neck Top (Cabin Fever/Black) Women
Hot Chillys - MTF Sublimated Print Scoop Neck Top (Cabin Fever/Black) Women's T Shirt
On sale - now $27.99 - was $55

Hot Chillys - MTF Print Zip-T (Safari/Black) Women
Hot Chillys - MTF Print Zip-T (Safari/Black) Women's Long Sleeve Pullover
On sale - now $29.99 - was $65