Description

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

The Thermowave Men’s Merino Warm Thermal LS Shirt is an ultra-lightweight base layer designed to deliver an exceptional warmth-to-weight ratio in cool to cold weather conditions. Made from 100% natural merino wool (180 GSM), this shirt provides reliable insulation without bulk, making it ideal when every ounce matters.

Thanks to its unique rib knit structure, the Merino Warm collection offers excellent thermal regulation, breathability, and next-to-skin comfort. The natural antibacterial properties of merino wool help prevent odors, while the soft fibers ensure a no-itch, dry, and comfortable feel throughout prolonged outdoor activity.

Designed with performance in mind, the shirt features a next-to-skin fit, raglan sleeves for unrestricted movement, and flatlock seams to eliminate chafing. It is a dependable choice for active use in cold environments.

Key Features

• Next-to-skin performance fit
• 100% merino wool – natural temperature regulation
• Ultra-lightweight construction (180 GSM)
• Special knitting structure for warmth with minimal bulk
• Longer back for improved cold protection
• Raglan sleeves for maximum mobility
• Crew neck for everyday comfort
• Flatlock seams to reduce chafing
• Naturally antibacterial and odor resistant
• Breathable and moisture regulating
• Eco-friendly and biodegradable material

Technical Specifications

• Material: 100% merino wool
• Fabric weight: 180 GSM
• Fit: Next to skin
• Construction: Rib knit, flatlock seams
• Gender: Men

Recommended Use

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

Sustainability

Merino wool acts as a natural climate control system, keeping the body warm in cold conditions and cool when temperatures rise. It is a renewable, biodegradable material that regrows annually and comes from natural resources such as water, sunlight, and grass.

All Thermowave merino garments are made using mulesing-free wool. This commitment supports animal welfare and reflects Thermowave’s dedication to responsible and sustainable production.

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)

Following these steps will maximize the longevity, comfort, and performance of your Thermowave base layer.

FAQ

Glossary

• Merino wool: A natural fiber known for temperature regulation, breathability, and softness.
• GSM: Grams per square meter, indicating fabric thickness and weight.
• Flatlock seams: Low-profile seams designed to minimize skin irritation.
• Raglan sleeves: Sleeve construction that improves mobility and comfort.

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.