Base Layers

Browse and compare the lightest Base Layers for ultralight backpacking. Sort by weight, filter by brand, and find the best Clothing options for your loadout.

122 productsLightest46 gMedian166 gHeaviest440 g
–g
Dry Layer Basic T
finetrackDry Layer Basic T
46 g
Dry Layer Basic T (Men's)
FinetrackDry Layer Basic T (Men's)
46 g
Merino Blend 75 Cool-Lite Featherlight Short Sleeve Crewe
IcebreakerMerino Blend 75 Cool-Lite Featherlight Short Sleeve Crewe
55 g
Thermoflex 2 Arm Warmer
CastelliThermoflex 2 Arm Warmer
61 g
Elemental Layer Cool Short Sleeve Crew
FinetrackElemental Layer Cool Short Sleeve Crew
72 g
Capilene Cool Lightweight Shirt
PatagoniaCapilene Cool Lightweight Shirt
74 g
Thermasilk Heritage Long Sleeve Crew Shirt
TerramarThermasilk Heritage Long Sleeve Crew Shirt
75 g
Active F-Dry Light Eco Base Layer T-Shirt
OdloActive F-Dry Light Eco Base Layer T-Shirt
76 g
PatagoniaCapilene Cool Merino Blend Shirt
88 g
Women's HEATTECH Leggings
UniqloWomen's HEATTECH Leggings
89 g
Capilene® Lightweight Bottoms
PatagoniaCapilene® Lightweight Bottoms
89 g
MT500 Merino Wool T-Shirt
DecathlonMT500 Merino Wool T-Shirt
91 g
Men's Capilene® Cool Ultra Hoody
PatagoniaMen's Capilene® Cool Ultra Hoody
94 g
Merino Tank Top MT500
DecathlonMerino Tank Top MT500
98 g
MT500 Merino Wool Mountain Trek Tank Top
DecathlonMT500 Merino Wool Mountain Trek Tank Top
98 g
Merino Top for Mountain Trekking Women's MT500
ForclazMerino Top for Mountain Trekking Women's MT500
98 g
Capilene® Cool Lightweight Shirt
PatagoniaCapilene® Cool Lightweight Shirt
98 g
Capilene® Lightweight Crew
PatagoniaCapilene® Lightweight Crew
2 variants		99 g
AIRism Crew Neck T-Shirt
UNIQLOAIRism Crew Neck T-Shirt
99 g
Brassière en Laine Mérinos MT500
ForclazBrassière en Laine Mérinos MT500
101 g
Thermasilk Pointelle Pant (Silk Legging)
TerramarThermasilk Pointelle Pant (Silk Legging)
113 g
HH LIFA T-Shirt
Helly HansenHH LIFA T-Shirt
115 g
REI Co-opLightweight Base Layer Tights
122 g
Trilogy Wool TS LS
MilletTrilogy Wool TS LS
127 g
KUIUULTRA Merino 120 LT SS Crew-T
128 g
Capilene® Cool Daily Shirt
PatagoniaCapilene® Cool Daily Shirt
128 g
Capilene® Cool Daily Shirt - Boardshort Logo
PatagoniaCapilene® Cool Daily Shirt - Boardshort Logo
128 g
Tank Top Merino/Tencel
HERMKOTank Top Merino/Tencel
130 g
Evolutyon UW Shirt
UYNEvolutyon UW Shirt
130 g
Cormac Crew Neck Shirt LS
Arc'teryxCormac Crew Neck Shirt LS
135 g
Breeze Merino 150 Long Sleeve Base Layer
DevoldBreeze Merino 150 Long Sleeve Base Layer
135 g
Merino Blend 125 ZoneKnit
IcebreakerMerino Blend 125 ZoneKnit
135 g
100% Light Merino Long Sleeve
Yamatomichi100% Light Merino Long Sleeve
135 g
Base Alpha™ Direct 90 Thermal Legging
LobtreeBase Alpha™ Direct 90 Thermal Legging
136 g
Merino Resist Short-Sleeved T-Shirt
DecathlonMerino Resist Short-Sleeved T-Shirt
137 g
Merino Resist Short-Sleeve T-Shirt
DecathlonMerino Resist Short-Sleeve T-Shirt
137 g
T-shirt Merino Resist
DecathlonT-shirt Merino Resist
137 g
Long-Sleeved Capilene® Cool Merino Blend Shirt
PatagoniaLong-Sleeved Capilene® Cool Merino Blend Shirt
139 g
Men's Capilene® Cool Merino Blend Shirt
PatagoniaMen's Capilene® Cool Merino Blend Shirt
139 g
Super Thermo Shirt
BrynjeSuper Thermo Shirt
140 g
Base Tee 140
Super.NaturalBase Tee 140
140 g
HH LIFA Pant
Helly HansenHH LIFA Pant
142 g
Super Thermo Shirt w/ Shoulder Inlay
BrynjeSuper Thermo Shirt w/ Shoulder Inlay
143 g
Dryflo Tee
RabDryflo Tee
143 g
Forclaz Trek 500 Merino Wool T-Shirt (Merino Resist)
DecathlonForclaz Trek 500 Merino Wool T-Shirt (Merino Resist)
145 g
Evolutyon Xtreme UW Pants Long
UYNEvolutyon Xtreme UW Pants Long
147 g
Merino Wool Short-Sleeve T-Shirt (Travel 500)
DecathlonMerino Wool Short-Sleeve T-Shirt (Travel 500)
148 g
Wool Thermo Light Zip-Polo 3/4 Neck
BrynjeWool Thermo Light Zip-Polo 3/4 Neck
150 g
Technical Merino 150 LS
FUSIONTechnical Merino 150 LS
150 g
Merino Blend 125 Cool-Lite™ Sphere Short Sleeve Tee
IcebreakerMerino Blend 125 Cool-Lite™ Sphere Short Sleeve Tee
150 g
Octa Camp Pants
ZpacksOcta Camp Pants
151 g
Capilene® Midweight Bottoms
PatagoniaCapilene® Midweight Bottoms
158 g
Cormac Heavyweight Shirt LS
Arc'teryxCormac Heavyweight Shirt LS
160 g
Abisko Day Hike Half Zip
FjällrävenAbisko Day Hike Half Zip
160 g
220 Merino Long Johns
Macpac220 Merino Long Johns
160 g
Men's Summit Series Pro 120 Crew
The North FaceMen's Summit Series Pro 120 Crew
160 g
Rho
Arc'teryxRho
162 g
Men's Pursuit Ultralight Long Sleeve Merino Shirt
Ridge MerinoMen's Pursuit Ultralight Long Sleeve Merino Shirt
162 g
Women's Merino Wool T-shirt
DillingWomen's Merino Wool T-shirt
165 g
Merino 175 Everyday
IcebreakerMerino 175 Everyday
165 g
WoolNet
AclimaWoolNet
166 g
Crater Lake™ Hoody
Mountain HardwearCrater Lake™ Hoody
168 g
Men's Silk Underwear, Crewneck
L.L.BeanMen's Silk Underwear, Crewneck
170 g
Men's Silk Underwear, Pants
L.L.BeanMen's Silk Underwear, Pants
170 g
Merino 150 Anatomica Tank
IcebreakerMerino 150 Anatomica Tank
171 g
Merino Blend 125 ZoneKnit Long Sleeve Crewe Thermal Top
IcebreakerMerino Blend 125 ZoneKnit Long Sleeve Crewe Thermal Top
173 g
Capilene Cool Sun Hoody
PatagoniaCapilene Cool Sun Hoody
176 g
Capilene® Midweight Crewneck
PatagoniaCapilene® Midweight Crewneck
176 g
Blackcomb Eco Base Layer Bottoms
OdloBlackcomb Eco Base Layer Bottoms
178 g
Merino 200 Oasis Thermal Leggings
IcebreakerMerino 200 Oasis Thermal Leggings
178 g
KUIUULTRA Merino 120 LT LS Hoodie
179 g
Rose Long Sleeve Baselayer
Kari TraaRose Long Sleeve Baselayer
179 g
Capilene Cool Daily Hoody
PatagoniaCapilene Cool Daily Hoody
179 g
Men's Capilene® Cool Daily Hoody
PatagoniaMen's Capilene® Cool Daily Hoody
179 g
Rho Bottom
Arc'teryxRho Bottom
180 g
Rho LT Bottom
Arc'teryxRho LT Bottom
180 g
HH Active Flow Long Underwear Bottoms
Helly HansenHH Active Flow Long Underwear Bottoms
180 g
Women's Intraknit Thermal Merino Base Layer Crew
SmartwoolWomen's Intraknit Thermal Merino Base Layer Crew
181 g
Forclaz MT500 Merino Wool Legging Baselayer
DecathlonForclaz MT500 Merino Wool Legging Baselayer
182 g
Merinoshirt Herren langarm Trekking - Merino Fresh
DecathlonMerinoshirt Herren langarm Trekking - Merino Fresh
184 g
Merinoshirt Langarm Travel 500
DecathlonMerinoshirt Langarm Travel 500
184 g
Force Hoody
RabForce Hoody
187 g
Men's Aspect Midweight Merino Wool Base Layer Bottoms
Ridge MerinoMen's Aspect Midweight Merino Wool Base Layer Bottoms
187 g
MT500 Merino Wool Base Layer Tights
ForclazMT500 Merino Wool Base Layer Tights
190 g
Smekker Long Sleeve Baselayer
Kari TraaSmekker Long Sleeve Baselayer
190 g
Ull Stilongs
StormbergUll Stilongs
195 g
Lyngen Merino T-Shirt 2.0
UrbergLyngen Merino T-Shirt 2.0
202 g
Merino 200 Oasis Long Sleeve Crewe Thermal Top
IcebreakerMerino 200 Oasis Long Sleeve Crewe Thermal Top
2 variants		206 g
Men's Capilene® Thermal Weight Baselayer Zip-Neck Pullover
PatagoniaMen's Capilene® Thermal Weight Baselayer Zip-Neck Pullover
206 g
Vapor Tee
DuckworthVapor Tee
207 g
Merino 185 Base Layer Bottoms
REI Co-opMerino 185 Base Layer Bottoms
210 g
MT500 Long-sleeve 100% Merino Wool T-shirt
SimondMT500 Long-sleeve 100% Merino Wool T-shirt
210 g
Lyell 180 Merino T-Shirt
MacpacLyell 180 Merino T-Shirt
215 g
Duo Active Merino 205 Shirt Man
DevoldDuo Active Merino 205 Shirt Man
220 g
200 Oasis Leggings with Fly
Icebreaker200 Oasis Leggings with Fly
220 g
Trek 500 Long Sleeved Merino Wool Hiking T-Shirt
ForclazTrek 500 Long Sleeved Merino Wool Hiking T-Shirt
221 g
LIFA® Merino Midweight Crew Base Layer
Helly HansenLIFA® Merino Midweight Crew Base Layer
221 g
MT500 Merino Wool Long-sleeve Shirt
ForclazMT500 Merino Wool Long-sleeve Shirt
222 g
Merino 250 Base Layer Bottom
MeriwoolMerino 250 Base Layer Bottom
224 g
Merino 250 Base Layer Bottom
MERIWOOLMerino 250 Base Layer Bottom
224 g
Classic Thermal Merino Base Layer Bottom
SmartwoolClassic Thermal Merino Base Layer Bottom
227 g
Beru Merino Wool Base Layer Top
RegattaBeru Merino Wool Base Layer Top
236 g
Classic Thermal Merino Base Layer Crew
SmartwoolClassic Thermal Merino Base Layer Crew
236 g
Merino 260 Tech Thermal Leggings
icebreakerMerino 260 Tech Thermal Leggings
240 g
Men's Merino Wool Long Sleeve Top
DillingMen's Merino Wool Long Sleeve Top
241 g
Merino Resist Long-Sleeve Zip T-Shirt
DecathlonMerino Resist Long-Sleeve Zip T-Shirt
243 g
Trek 500 Merino Wool Backpacking Tights
ForclazTrek 500 Merino Wool Backpacking Tights
247 g
RaceX Classic Pants
SwixRaceX Classic Pants
249 g
HEATTECH T-Shirt
UNIQLOHEATTECH T-Shirt
264 g
Downhill Base Layer Pants
RevolutionRaceDownhill Base Layer Pants
266 g
Classic Thermal Merino Crew Base Layer Top
SmartwoolClassic Thermal Merino Crew Base Layer Top
275 g
Merino 250 Baselayer Crew
SmartwoolMerino 250 Baselayer Crew
275 g
Merino 250 Base Layer Long Sleeve Crew
SmartwoolMerino 250 Base Layer Long Sleeve Crew
276 g
Heavyweight Merino Long-Sleeve Base Layer Crew Top
REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top
280 g
R1® Air Zip-Neck
PatagoniaR1® Air Zip-Neck
289 g
Classic Thermal Merino Base Layer 1/4 Zip
SmartwoolClassic Thermal Merino Base Layer 1/4 Zip
2 variants		298 g
MT900 Merino Wool Long-Sleeved Trekking T-Shirt
ForclazMT900 Merino Wool Long-Sleeved Trekking T-Shirt
350 g
Active Compression Running Tights
PudollaActive Compression Running Tights
355 g
Merino Composite 230 1/4 Zip Top
StoicMerino Composite 230 1/4 Zip Top
408 g
Crew Neck 200
WoolpowerCrew Neck 200
440 g
Men's Merino Wool Long Johns with Fly
DillingMen's Merino Wool Long Johns with Fly
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Technical Merino 150 T-Shirt
FusionTechnical Merino 150 T-Shirt
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