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
REI
Midweight Space Dye Tights
Base Layer Bottom
$35
REI Lightweight Polartec Power Dry MTS Long-Sleeve Crew
REI
Lightweight Polartec Power Dry MTS Long-Sleeve Crew
Base Layer Top
$17
REI Lightweight MTS Polartec Power Dry Bottoms
REI
Lightweight MTS Polartec Power Dry Bottoms
Base Layer Bottom
$35
REI Silk Camisole
REI
Silk Camisole
Base Layer Top
$35
REI Seamless Long-Sleeve T-Shirt
REI
Seamless Long-Sleeve T-Shirt
Base Layer Top
$60
REI Midweight Polartec Power Dry Crew
REI
Midweight Polartec Power Dry Crew
Base Layer Top
$19 - $24
REI Lightweight MTS Polartec Power Dry Zip-T
REI
Lightweight MTS Polartec Power Dry Zip-T
Base Layer Top
$40
REI Midweight Space Dye Zip-T Shirt
REI
Midweight Space Dye Zip-T Shirt
Base Layer Top
$42
REI Mesh MTS Briefs
REI
Mesh MTS Briefs
Base Layer Bottom
$19
REI Midweight Long Underwear Bottoms
REI
Midweight Long Underwear Bottoms
Base Layer Bottom
$23 - $29
 
REI
Heavyweight Long Underwear Bottoms
Base Layer Bottom
$50
REI Heavyweight Tights
REI
Heavyweight Tights
Base Layer Bottom
$45
REI Heavyweight Crew Shirt
REI
Heavyweight Crew Shirt
Base Layer Top
$50
REI Silk V-Neck
REI
Silk V-Neck
Base Layer Top
$45
REI Seamless Tights
REI
Seamless Tights
Base Layer Bottom
$50
REI Midweight Space Dye Crew Shirt
REI
Midweight Space Dye Crew Shirt
Base Layer Top
$35
REI Lightweight Quarter-Zip Shirt
REI
Lightweight Quarter-Zip Shirt
Base Layer Top
$47
REI Boxer Jack Underwear
REI
Boxer Jack Underwear
Boxers, Briefs, Bikini
$23
REI Silk Bottoms
REI
Silk Bottoms
Base Layer Bottom
$45
REI Midweight Polartec Power Dry Half Zip Top
REI
Midweight Polartec Power Dry Half Zip Top
Base Layer Top
$23 - $29
REI Silk Long Underwear Bottom
REI
Silk Long Underwear Bottom
Base Layer Bottom
$45
REI Lightweight Crew Shirt
REI
Lightweight Crew Shirt
Base Layer Top
$37
REI Lightweight Long Underwear Bottoms
REI
Lightweight Long Underwear Bottoms
Base Layer Bottom
$37
REI Midweight Long Underwear Crewneck
REI
Midweight Long Underwear Crewneck
Base Layer Top
$30
REI Midweight Polartec Power Dry Bottom
REI
Midweight Polartec Power Dry Bottom
Base Layer Bottom
$25 - $26
REI Mesh MTS Boxer Briefs
REI
Mesh MTS Boxer Briefs
Base Layer Bottom
$23
REI Lightweight Polartec Power Dry Crew
REI
Lightweight Polartec Power Dry Crew
Base Layer Top
$30
REI Silk Long-Sleeve Crew
REI
Silk Long-Sleeve Crew
Base Layer Top
$45
REI Mesh MTS Boxers
REI
Mesh MTS Boxers
Base Layer Bottom
$23
REI Midweight Long Underwear Half-Zip
REI
Midweight Long Underwear Half-Zip
Base Layer Top
$37
REI Seamless Tank Top
REI
Seamless Tank Top
Base Layer Top
$40
REI Heavyweight Quarter-Zip Top
REI
Heavyweight Quarter-Zip Top
Base Layer Top
$55
REI Heavyweight Half-Zip Shirt
REI
Heavyweight Half-Zip Shirt
Base Layer Top
$60
REI Midweight Crew Heather Top
REI
Midweight Crew Heather Top
Base Layer Top
$20
REI Expedition-Weight Crew Top
REI
Expedition-Weight Crew Top
Base Layer Top
$30
REI Airflyte Top
REI
Airflyte Top
$20 - $29
REI Expedition-Weight Long Underwear Bottoms
REI
Expedition-Weight Long Underwear Bottoms
Base Layer Bottom
$25 - $29
REI Expedition-Weight Quarter-Zip Top
REI
Expedition-Weight Quarter-Zip Top
Base Layer Top
$30 - $34
REI Midweight Heather Long Underwear Bottoms
REI
Midweight Heather Long Underwear Bottoms
Base Layer Bottom
$20
REI Midweight Print Union Suit
REI
Midweight Print Union Suit
One-Piece Base Layer
$25
REI Midweight Crew Print Top
REI
Midweight Crew Print Top
Base Layer Top
$23
REI Midweight Quarter-Zip Top
REI
Midweight Quarter-Zip Top
Base Layer Top
$25
REI Midweight Polartec Power Dry Zip-T
user rating: 5 of 5 (1)
REI
Midweight Polartec Power Dry Zip-T
Base Layer Top
$37 MSRP
REI Heavyweight MTS Bottoms
user rating: 4 of 5 (1)
REI
Heavyweight MTS Bottoms
Base Layer Bottom
$35 MSRP
 
REI
Micro Fleece Long Underwear Bottoms
Base Layer Bottom
REI Heavyweight Polartec Power Dry Bottoms
REI
Heavyweight Polartec Power Dry Bottoms
Base Layer Bottom
$45 MSRP
REI Heavyweight Polartec Power Dry Crew
REI
Heavyweight Polartec Power Dry Crew
Base Layer Top
$45 MSRP
REI Lightweight MTS Polartec Power Dry Crew
REI
Lightweight MTS Polartec Power Dry Crew
Base Layer Top
$25 MSRP
REI Midweight Polartec Power Dry Allstar Suit
REI
Midweight Polartec Power Dry Allstar Suit
One-Piece Base Layer
REI Bikini Briefs
REI
Bikini Briefs
Boxers, Briefs, Bikini
$15 MSRP
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