Icebreaker Men's Merino 260 Tech Thermal Long Sleeve Base Layer

Men’s Icebreaker® Merino 260 Tech Thermal Crew – 100% Merino Wool Base Layer

The Men’s Icebreaker® Merino 260 Tech Crew is the warmest, heavyweight base layer in Icebreaker’s 100% Merino Wool collection, engineered for extreme cold-weather performance. Made from 260gsm Merino wool, this slim-fit, fitted base layer delivers the best warmth-to-weight ratio in the Icebreaker natural base layer range, making it ideal for alpine sports, winter trekking and high-altitude adventures.

Designed for next-to-skin comfort, the long-sleeve crew neck construction feels exceptionally soft while naturally regulating body temperature. Merino wool keeps you warm in freezing conditions without overheating during intense activity, offering reliable performance across changing environments.

Precision engineered with minimal, strategically placed flat seams, the Merino 260 Tech Crew reduces chafing and enhances durability, even when worn under multiple layers. A longer body hem provides added coverage when bending or moving, helping to keep the lower back protected in cold conditions. Finished with a low-impact Icebreaker® brand decal, the design remains clean and technical.

Manufactured to Icebreaker’s exacting standards, the Merino fibres are ethically sourced and pre-shrunk during production, ensuring long-lasting shape retention and consistent fit. Naturally anti-bacterial and odour-resistant, this base layer stays fresher for longer on multi-day adventures, with the added convenience of being machine washable at 40°C.

Key Features:

• 100% natural Merino wool
• Heavyweight 260gsm fabric for maximum warmth
• Slim, fitted base layer construction
• Excellent warmth-to-weight performance
• Naturally breathable and temperature regulating
• Odour-resistant and antibacterial
• Strategically placed flat seams to reduce chafing
• Longer body length for enhanced coverage
• Pre-shrunk to maintain shape and size
• Machine washable at 40°C

The Men’s Icebreaker® Merino 260 Tech Crew is a premium thermal base layer designed for serious cold-weather use, delivering dependable warmth, comfort and performance in the harshest conditions.

Size Guide

• XS: Chest 33–35 in | Arm length 33.5 in
• S: Chest 35–37 in | Arm length 33.8 in
• M: Chest 37–40 in | Arm length 34 in
• L: Chest 40–43.5 in | Arm length 34.3 in
• XL: Chest 43.5–46.5 in | Arm length 34.5 in
• XXL: Chest 46.5–49.5 in | Arm length 34.8 in
• XXXL: Chest 49.5–53 in | Arm length 35.3 in