Icebreaker 200 Oasis Long Sleeve Crew Neck Men's Merino Wool Base Layer Shirt

The Icebreaker 200 Oasis Long Sleeve Crew Neck is a premium men's base layer shirt engineered for versatile performance in various climates. Constructed from 100% high-quality merino wool with a fabric weight of 200 g/m², this garment provides exceptional thermal regulation by trapping heat when it is cold and releasing it as your body temperature rises. Its natural moisture-wicking and odor-resistant properties make it an essential foundation for active individuals seeking comfort and reliability during extended outdoor use.

Advantages

This base layer offers superior comfort due to the soft, non-itchy nature of pure merino wool. The fabric is highly breathable and naturally manages moisture, keeping the skin dry during intense physical activity. Its slim fit design ensures it layers easily under other clothing without adding unnecessary bulk, while the high-quality construction maintains its shape and performance over time.

Suitable for

• Hiking and trekking
• Running and trail sports
• Cold-weather layering
• Everyday outdoor activities

When it may not be suitable

This shirt is designed primarily as a base layer for moderate to cold conditions. It may not be the most suitable choice for extremely hot environments where maximum ventilation is required, or for activities where a loose, oversized fit is preferred over a slim, athletic cut.

Key specifications

• Material: 100% Merino wool
• Fabric weight: 200 g/m²
• Fit: Slim fit
• Gender: Male
• Care: Machine wash at 40°C

How to use

Wear the Icebreaker 200 Oasis directly against your skin as the first layer of your clothing system. For optimal performance, pair it with breathable mid-layers and outer shells depending on the weather conditions. The natural properties of the wool allow for multiple wears between washes, as it resists odors effectively.

What to consider before purchase

• Check the size guide to ensure the correct slim fit for your body type.
• Follow the specific care instructions to maintain the integrity of the merino wool fibers.
• Consider the intended temperature range for your activities to ensure the 200 g/m² weight is appropriate.

Usage recommendations

To maintain the quality of your merino wool garment, always wash it in a machine at 40°C using a cycle for colored laundry. Do not use fabric softeners or bleach, and avoid tumble drying or dry cleaning to prevent damage to the natural fibers.