Description

THERMOWAVE Men's Merino Xtreme Thermal LS Shirt

The Thermowave Merino Xtreme Long Sleeve Shirt is our best-selling 220 GSM dual-layer base layer, designed for bravers who face cold weather during winter sports, mountaineering, hiking, camping, bushcraft, or training outdoors. Crafted from a premium blend of Merino wool and Polyester, it offers an unbeatable balance of warmth, durability, and moisture management.

The inner layer of functional Polyester ensures rapid moisture wicking, keeping you dry and comfortable during high activity. The outer Merino wool and polyamide blend provides exceptional insulation, natural antibacterial properties to resist odors, and eco-friendly sustainability. With a super-soft touch, flat seams, and a tailored fit, this thermal shirt guarantees all-day comfort without itching – even for sensitive skin.

This base layer is built to deliver maximum warmth-to-weight ratio, superior moisture management, and long-lasting comfort, making it ideal for demanding cold-weather conditions. Designed for those who require dependable thermal performance without compromise.

Perfect for winter sports athletes, hikers, bushcrafters, travelers, cyclists, and outdoor professionals. Whether you’re on a ski slope, mountain trail, or expedition, the Merino Xtreme Shirt ensures you stay warm, dry, and odor-free.

Wear the Merino Xtreme shirt as your first layer in cold weather. The slim fit ensures it works seamlessly under mid-layers or outer shells. Thanks to its longer backside design, it provides extra coverage and warmth, preventing cold air from entering.

Due to MerinoDry technology, you’ll stay fresh, dry, and warm for longer periods, no matter how intense your activity gets.

Specifications

• Material: 80% Merino wool & 20% polyamide (outside), 100% functional polyester (inside)
• Fabric Thickness: 220 GSM dual layer
• Fit: Next-to-skin, ergonomic design
• Features: Flatlock seams (anti-chafing), long backside, ultra-soft touch, odor resistant
• Moisture Management: Quick-drying inner polyester
• Insulation: Natural Merino wool for warmth & breathability
• Weight Class: Lightweight, warm, and durable
• Eco-friendly: Merino wool is mulesing-free, biodegradable, and renewable

Sustainability

Merino wool acts as your body’s natural air-conditioning system, regulating temperature in both cold and hot conditions. It is 100% natural, renewable, and biodegradable. Thermowave exclusively sources mulesing-free wool, supporting animal welfare while ensuring the highest garment quality.

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, dry flat
• Cool iron if needed (max 110°C)

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

Size Guide

Refer to the official 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

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

© Thermowave / Termosportas UAB. Specifications may change without notice for product improvement.