Sale: from 50 % off
For what?
High effort
Try a high step and a squat. The crotch should not pull and the waist must stay comfortable beneath the outer trousers.
- Try a squat
- Smooth crotch
- Comfortable waist
Cool days
Try the base layer together with your outer trousers. A close fit leaves room for movement; thicker fabric is not automatically better for a hard climb.
- Try both layers
- Check knee movement
- Avoid bulky folds
Merino wool
Read the wool percentage and care instructions. A blend may feel different from pure wool; try it against sensitive areas too.
- Read wool content
- Check skin feel
- Follow wool care
Synthetic fabric
Synthetic base layers come in different weights and structures. Check the model’s material and cut rather than inferring warmth from its name.
- Read fabric details
- Feel the seams
- Try beneath a jacket
No products match these filters.
Top brands in Men's
Show all brands
- 4F
- adidas Terrex
- Armada
- Bergans
- Black Diamond
- CMP
- Colmar
- Columbia
- Craft
- Daehlie
- Dainese
- Dale of Norway
- Dare2b
- Devold of Norway
- Dynafit
- Ein schöner Fleck Erde
- Elevenate
- Falke
- Halti
- Helly Hansen
- Horsefeathers
- Houdini
- Icebreaker
- Jack Wolfskin
- Karpos
- Klättermusen
- La Sportiva
- Lenz
- Lundhags
- Löffler
- Maloja
- Martini
- MAUL Sport
- Millet
- Mons Royale
- Montura
- Mountain Hardwear
- Odlo
- Ortovox
- Outdoor Research
- Picture
- Pinewood
- POC
- Protest
- Puma
- Rab
- Reusch
- Salewa
- Saxx
- Schöffel
- Scott
- Slope
- SOS
- Sportful
- Super.Natural
- Swix
- Ternua
- The North Face
- Trespass
- U-Power
- Under Armour
- Uyn
- We Norwegians
- Whistler
- X-Bionic
No brand found
Guide
Men’s base layer bottoms
Baselayer bottoms should sit smoothly beneath trousers. Check the waist, crotch and leg length; extra warmth must not create folds inside a boot.
Key points
- A smooth crotch and comfortable waist matter more than maximum tightness.
- Choose leg length to avoid folds inside boots.
- Match fabric weight to activity and the outer trousers.
Which base layer bottoms suit your plans?
| Use | Priority | What to look for |
|---|---|---|
| High effort | PriorityMovement without bunching | What to look forTry a high step and a squat. |
| Cool days | PriorityLayering under trousers | What to look forTry the base layer together with your outer trousers. |
| Merino wool | PriorityWool against skin | What to look forRead the wool percentage and care instructions. |
| Synthetic fabric | PriorityFor active layering | What to look forSynthetic base layers come in different weights and structures. |
Types compared
Merino wool (Wool content)
Wool fabric for outings with changing effort.
- Advantage: Wool against the skin
- Drawback: Follow wool care instructions
Synthetic fabric (Without wool)
Synthetic fabric for active days and regular washing.
- Advantage: Fabric intended for activity
- Drawback: Check the feel against skin
What to check before buying
| Question | In brief | Why |
|---|---|---|
| Which size? | In briefWaist and hips separately | WhyCheck waist and inside leg separately. Even with a comfortable waist, the thighs and seat need room for a high step. |
| Which length? | In briefKeep folds out of boots | WhyA shorter leg can help with tall boots; full-length bottoms must lie smooth. |
| Which waistband? | In briefComfort beneath other layers | WhyStacked waistbands should not press when seated. |
| A concrete fabric example? | In briefLöffler Men 3/4 Underpants Transtex Light 100 | WhyAccording to Löffler: 5% elastane. This is this model’s composition, not a guarantee for the whole category. |
Frequently asked questions
Should base layer bottoms be very tight?
No. They should sit close without pulling at the crotch or squeezing the waist. Try a deep squat beneath the trousers you plan to wear.
Do I always need merino?
No. Synthetics and wool blends are also possible first layers. Choose according to activity, skin feel and care rather than a blanket promise about a material.
Full-length or shorter bottoms?
Match the hem to your footwear. Fabric should lie smoothly at the top of the boot; avoid thick folds beneath a close-fitting cuff.
How should I wash it?
Follow the individual care label. Temperature, detergent and drying depend on the material; general wool care is not right for every blend.
Last updated: October 2026