REI Base Layers and Underwear

Categories

Tops
Bottoms
One-Piece Base Layers
Boxers, Briefs, Bikinis

Genders

Men's
Women's
Kids'
Boys'
Girls'

Price

less than $25
$25 - $49.99
$50 and above

Sort by: name | rating | price | availability | recently reviewed

REI Midweight Space Dye Tights Base Layer Bottom
$23 - $34
REI Lightweight Polartec Power Dry MTS Long-Sleeve Crew Base Layer Top
$22
REI Silk Camisole Base Layer Top
$35
REI Seamless Long-Sleeve T-Shirt Base Layer Top
$29
REI Midweight Space Dye Zip-T Shirt Base Layer Top
$28 - $42
REI Mesh MTS Briefs Base Layer Bottom
$19
REI Midweight Long Underwear Bottoms Base Layer Bottom
$16 - $29
REI Heavyweight Long Underwear Bottoms Base Layer Bottom
$34 - $49
 
REI Heavyweight Tights Base Layer Bottom
$50
REI Heavyweight Crew Shirt Base Layer Top
$34
REI Silk V-Neck Base Layer Top
$45
 
REI Seamless Tights Base Layer Bottom
$24
REI Lightweight Long Underwear Crew Top Base Layer Top
$30 - $34
REI Midweight Space Dye Crew Shirt Base Layer Top
$23 - $34
REI Lightweight Quarter-Zip Shirt Base Layer Top
$47
 
REI Lightweight Long Underwear Zip Top Base Layer Top
$40
REI Silk Bottoms Base Layer Bottom
$45
REI Silk Long Underwear Bottom Base Layer Bottom
$45
REI Lightweight Crew Shirt Base Layer Top
$37
REI Lightweight Long Underwear Bottoms Base Layer Bottom
$35 - $36
REI Midweight Long Underwear Crewneck Base Layer Top
$27 - $29
REI Midweight Polartec Power Dry Bottom Base Layer Bottom
$27
REI Mesh MTS Boxer Briefs Base Layer Bottom
$23
REI Silk Long-Sleeve Crew Base Layer Top
$45
REI Mesh MTS Boxers Base Layer Bottom
$23
REI Midweight Long Underwear Half-Zip Base Layer Top
$37
 
REI Heavyweight Quarter-Zip Top Base Layer Top
$60
 
REI Midweight Polartec Power Dry Long Underwear Half-Zip Top Base Layer Top
$24
REI Heavyweight Half-Zip Shirt Base Layer Top
$41 - $59
REI Midweight Crew Heather Top Base Layer Top
$20
REI Midweight Heather Long Underwear Bottoms Base Layer Bottom
$20
REI Midweight Print Union Suit One-Piece Base Layer
$25
REI Midweight Crew Print Top Base Layer Top
$16 - $22
REI Midweight Quarter-Zip Top Base Layer Top
$17 - $24
user rating: 5 of 5 (1)
REI Midweight Polartec Power Dry Zip-T Base Layer Top
$37 MSRP
user rating: 4 of 5 (1)
REI Heavyweight MTS Bottoms Base Layer Bottom
$35 MSRP
REI Lightweight MTS Polartec Power Dry Bottoms Base Layer Bottom
$30 MSRP
REI Midweight Polartec Power Dry Crew Base Layer Top
$33 MSRP
 
REI Micro Fleece Long Underwear Bottoms Base Layer Bottom
REI Lightweight MTS Polartec Power Dry Zip-T Base Layer Top
$33 MSRP
REI Boxer Jack Underwear Boxers, Briefs, Bikini
REI Midweight Polartec Power Dry Half Zip Top Base Layer Top
REI Midweight MTS Bottoms Base Layer Bottom
$23 MSRP
REI Lightweight Polartec Power Dry Crew Base Layer Top
REI Expedition-Weight Crew Top Base Layer Top
REI Airflyte Top
$30 MSRP
REI Expedition-Weight Long Underwear Bottoms Base Layer Bottom
REI Expedition-Weight Quarter-Zip Top Base Layer Top
user rating: 5 of 5 (1)
REI Lightweight MTS Long-Sleeve Crew Base Layer Top
discontinued

In order to show you the most relevant gear, we have omitted some older, unreviewed products.

If you like, you can view the list with the older products included.