Description

Thermowave Men’s Merino Arctic Thermal LS Shirt – 100% Merino Wool Base Layer

The Thermowave Men’s Merino Arctic Thermal LS Shirt is designed for extreme cold conditions where maximum warmth and comfort are essential. Made from a premium blend of 95% merino wool and 5% elastane, this base layer combines natural insulation with excellent elasticity and freedom of movement.

With a 265 GSM fabric weight and a brushed inner surface, the Merino Arctic line delivers superior softness and heat retention while maintaining merino wool’s natural breathability and moisture management. This keeps the body warm, dry, and comfortable even during prolonged or high-intensity activities in cold environments.

The next-to-skin fit, longer back coverage, and flatlock seam construction make this shirt a reliable choice for demanding outdoor use where warmth, durability, and comfort matter most.

Key Features

• Next-to-skin performance fit
• Extra warm construction for the coldest conditions
• Brushed inside for superior softness and insulation
• 95% merino wool for natural warmth and breathability
• 5% elastane for elasticity and unrestricted movement
• Longer back for improved coverage
• Flatlock seams to minimize chafing
• Natural antibacterial and odor-resistant properties
• Eco-friendly materials

Technical Specifications

• Material: 95% merino wool, 5% elastane
• Fabric weight: 265 GSM
• Fit: Next to skin
• Inner finish: Brushed for extra warmth
• Construction: Flatlock seams
• Gender: Men

Recommended Use

• Winter sports
• Mountaineering
• Hiking
• Camping
• Bushcraft
• Outdoor activities
• Travel

Sustainability

Merino wool acts as a natural temperature regulator, keeping the body warm in cold environments and comfortable during activity. It is a renewable and biodegradable fiber sourced from nature.

All Thermowave merino garments use mulesing-free wool, supporting animal welfare and responsible production practices.

Care Guide

• Machine wash on wool cycle (max 30°C)
• Wash inside out with similar colors
• Use wool detergent only, avoid fabric softeners
• Do not bleach or tumble dry
• Reshape when wet and dry flat
• Cool iron if needed (max 110°C)

FAQ

Glossary

• Merino wool: Natural fiber known for warmth, breathability, and moisture regulation.
• GSM: Fabric weight measured in grams per square meter.
• Brushed inside: Inner surface treatment that increases warmth and softness.
• Flatlock seams: Seam construction designed to reduce friction and chafing.

Size Guide

Refer to the official Thermowave size chart for men's tops:

How to measure:
1. Arm length: Measure from the lowest part of the neck, across the shoulder, down past elbow and wrist (arm slightly bent).
2. Chest: Measure around the fullest part of your chest, under the arms.

Manufacturer / GPSR Information

Termosportas, UAB
Brastos g. 5
LT-47184 Kaunas
Lithuania
Customer support: thermowave.com/contact

Specifications may change without notice as part of continuous product improvement.