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Lightweight Base Layers

(117 products)

Products (117)

Sort: Best Match

Arms of Andes300 Lightweight Alpaca Wool Pullover Base Layer Hoodie - Women's
$140.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Sale Ends May 26
REI Co-opMerino 185 Base Layer Top - Women's
$48.89
Save 30%
compared to $69.95
41 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
Arc'teryxRho LT Crew Neck Base Layer Top - Men's
$70.83 - $100.00
27 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's
$67.49
Save 25%
compared to $90.00
13 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
Sale Ends May 26
REI Co-opLightweight Crew Base Layer Top - Women's
$20.89
Save 30%
compared to $29.95
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
Sale Ends May 26
REI Co-opLightweight Half-Zip Base Layer Top - Men's
$31.39
Save 30%
compared to $44.95
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Sale Ends May 26
SmartwoolClassic All-Season Merino Base Layer Bottoms - Men's
$67.49
Save 25%
compared to $90.00
18 reviews with an average rating of 4.1 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
REI Co-opLightweight Base Layer Tights - Women's
$27.89
Save 30%
compared to $39.95
5 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Plus
Sale Ends May 26
REI Co-opLightweight Crew Base Layer Top - Men's
$20.89
Save 30%
compared to $29.95
6 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Top Rated
Arms of Andes300 Lightweight Alpaca Wool Base Layer Leggings - Women's
$105.00
8 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Sale Ends May 26
SmartwoolClassic All-Season Merino 3/4 Base Layer Bottoms - Men's
$56.19
Save 25%
compared to $75.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's Plus Sizes
$55.89
Save 30%
compared to $79.95
26 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Sale Ends May 26
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Women's
$97.49
Save 25%
compared to $130.00
27 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Sale Ends May 26
Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's
$93.69
Save 25%
compared to $125.00
4 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes
$48.89
Save 30%
compared to $69.95
20 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Sale Ends May 26
SmartwoolIntraknit Thermal Merino Base Layer Bottoms - Men's
$97.49
Save 25%
compared to $130.00
21 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
REI Co-opMerino 185 Base Layer Bottoms - Men's Tall Sizes
$55.89
Save 30%
compared to $79.95
13 reviews with an average rating of 3.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Tall, Big
Sale Ends May 26
Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes
$55.89
Save 30%
compared to $79.95
8 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Tall
Sale Ends May 26
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
$62.89
Save 30%
compared to $89.95
13 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Tall
Sale Ends May 26
Top Rated
Icebreaker150 Anatomica Crewe Base Layer Top - Men's
$56.19
Save 25%
compared to $75.00
6 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women's
$86.19
Save 25%
compared to $115.00
16 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Helly HansenHH Durawool Graphic T-Shirt - Women's
$90.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
Sale Ends May 26
Top Rated
REI Co-opLightweight Crew Base Layer Top - Infants'/Toddlers'
$13.89
Save 30%
compared to $19.95
10 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Sale Ends May 26
Kari TraaRose High-Waisted Base Layer Pants - Women's
$76.99
Save 30%
compared to $110.00
24 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Ortovox120 Comp Light Short Base Layer Pants - Men's
$55.99 - $70.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 26
Top Rated
IcebreakerMerino 150 Tech Lite III Relaxed T-Shirt - Women's
$59.99
Save 25%
compared to $80.00
71 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Sale Ends May 26
REI Co-opMerino 185 Base Layer Top - Men's
$48.89
Save 30%
compared to $69.95
51 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Ortovox120 Comp Light Base Layer Hoody - Men's
$95.99 - $120.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Sale Ends May 26
SmartwoolClassic All-Season Merino Base Layer Bottoms - Women's
$67.49
Save 25%
compared to $90.00
95 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Plus
Sale Ends May 26
Top Rated
REI Co-opLightweight Base Layer Bottoms - Kids'
$20.89
Save 30%
compared to $29.95
9 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular

31–60 of 117 products

Sort: Best Match

Related Expert Advice articles

What material is best?

Wool is moisture-wicking and odor-resistant, while synthetic fabrics are more durable and less expensive.

Match the temp to the trek

Lightweight layers are best for moderate to cool temperatures. Midweight layers are best for cold temperatures. Heavyweight layers are best for below-freezing temperatures.

Find your fit

To be able to wick sweat efficiently, your next-to-skin layer needs to actually be next to your skin. A comfortably snug fit everywhere is your goal.

Read full article: How to Choose Base Layers

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