Base layers are the foundation of any outdoor clothing system. In the UK — where cold, damp and rapidly changing weather is common — the fabric you choose has a major impact on comfort.

This guide compares merino wool and synthetic base layers, helping you choose the best option for hiking, running and winter sports.

Merino Wool Base Layers

Merino wool offers unique advantages in UK conditions:

• Natural temperature regulation
  
• Warmth even when damp
  
• Excellent odour resistance
  
• Soft, comfortable next to skin
  

Merino adapts well to stop-start activity and changing weather, making it ideal for hiking, skiing and everyday winter use.

Explore Merino Base Layers

Synthetic Base Layers

Synthetic base layers:

• Dry very quickly
  
• Are often lighter
  
• Can feel clammy during stop-start activity
  
• Tend to retain odour
  

They can work well for short, high-intensity sessions but often lack comfort over longer days.

Which Is Better for UK Outdoor Use?

For most people, merino wool is the better all-round choice in UK conditions thanks to its comfort, versatility and performance when wet.

Synthetic layers suit specific high-intensity use cases, but merino excels across a wider range of activities.

Our Recommendation

If you want one base layer that works across:

• Hiking
  
• Skiing
  
• Cold-weather running
  
• Everyday winter wear
  

Merino wool is the most reliable option.

Shop Seamless Merino Base Layers Designed in Scotland

FAQs

Does merino itch?

High-quality merino is soft and comfortable for most people, even when worn directly against the skin.

Is merino harder to care for?

No. Modern merino base layers are machine washable and require minimal special care. Read more.