Why the Merino 200 Oasis Long Sleeve Crew Is the Ultimate Base Layer for Outdoor Adventures

June, 2025 | icebreaker

From alpine tracks in Fiordland to crisp autumn trails in the Blue Mountains, the Merino 200 Oasis Long Sleeve Crew is your go-to essential for any outdoor journey. Designed for versatility, performance, and comfort, this layer embodies everything icebreaker stands for: natural innovation, purposeful design, and sustainability in motion.

Whether you’re hiking, skiing, or commuting on chilly mornings, this midweight base layer helps you move naturally, breathe better, and stay warm without overheating.

Designed for All Climates

The lightweight merino wool makes this top ideal for year-round layering across both Australia and New Zealand. Soft yet technical, it acts as your second skin in winter and your temperature regulator in shoulder seasons.

● In New Zealand: Ideal for hikes like Routeburn or Roys Peak where weather can change in minutes.
● In Australia: Great for early starts on the Grampians Peaks Trail or cool bushwalks in the Blue Mountains.

Key Features

● 100% merino wool: Naturally breathable, odour-resistant, and insulating even when wet
● Flatlock seams: Prevents friction for added comfort during movement
● Offset shoulder seams: Ideal for wearing under a pack
● Slim fit: Perfect for layering under a mid-layer or jacket
● Drop tail hem: For added coverage

This crew is the evolution of performance wear—engineered to move with you and disappear on the body.

Natural Performance, Backed by Nature

Unlike synthetic thermals, merino wool doesn’t trap odour or overheat. It adapts to your body temperature, keeping you warm when it’s cold and cool when you’re active.

icebreaker sources its merino wool from ethical growers across New Zealand who practice regenerative grazing and animal welfare. That means better outcomes for the land, the animals, and your gear.

Styling Tips

● Base layer: Pair with icebreaker’s Underwear or ZoneKnit™ Tights for a full-body thermal system
● Mid-layer: Add the Descender Zip for colder conditions
● Outer layer: Finish with an outer layer for wind and rain protection

Tried, Tested, Loved

Thousands of explorers, climbers, and runners rely on the Oasis 200 Crew for everyday performance. Here’s what they say:

“I've been buying this exact same item for many years because it's quality, warm and looks good.” – James
“Combination of warmth and breathability! Perfect for ski.” – Jay

Ready to Layer Up?

Choose your style: - 👉 Men’s Merino 200 Oasis Crew - 👉 Women’s Merino 200 Oasis Crew

Or browse our full Hike Collection to build your adventure-ready outfit.

Sustainable. Versatile. Reliable.

The Merino 200 Oasis Long Sleeve Crew isn’t just a base layer—it’s your year-round partner in performance, helping you stay warm, move freely, and connect with nature, no matter where your path leads.

Pack lighter, wear longer, and go further—with merino that works as hard as you do.