Lightweight, breathable, and naturally odor-resistant, the Arc'teryx Ionia Merino Wool Shirt SS delivers comfortable performance for hiking, trail running, and everyday outdoor wear.

The Arc'teryx Ionia Merino Wool Shirt SS combines the natural performance of fine Merino wool with the durability of a nylon core. The soft, breathable fabric helps regulate temperature and manage moisture, while Merino's natural odor resistance makes it a reliable choice for long days outdoors.

The lightweight construction also makes it an easy base layer or everyday outdoor shirt for changing conditions.

Made with RWS-certified Merino wool and produced at a Fair Trade Certified™ facility, the Ionia delivers technical performance with a more responsible approach to materials and manufacturing.

Why You Should Buy the Arc'teryx Ionia Merino Wool Shirt SS

• Natural Merino Performance: Helps regulate temperature while providing breathable, lightweight comfort.
• Odor Resistant: Merino wool naturally resists odors, making it ideal for extended outdoor use.
• Soft & Comfortable: Fine-gauge Merino fibers feel soft against the skin.
• Durable Construction: Merino fibers are wrapped around a nylon core for added strength.
• Lightweight: Weighing just 155 g / 5.5 oz, it's easy to wear or pack.
• Built for Movement: Articulated patterning allows unrestricted mobility on the trail.
• Versatile Layer: Works well as a hiking shirt, trail running top, or lightweight base layer.
• Responsible Wool: Made with 100% RWS-certified wool.