The Arc'teryx Ionia Merino Wool Short Sleeve Shirt transforms your mountain adventures with the perfect fusion of natural performance and technical innovation. Built for trail runners and hikers who demand gear that keeps up with their ambitions, this fitted base layer features premium merino wool wrapped around a durable nylon core, delivering the temperature regulation and odor resistance you need on multi-day treks while adding the longevity to handle rugged terrain season after season. The articulated patterning and trim profile move seamlessly with your body whether you're powering up switchbacks or navigating technical descents, while the lightweight construction layers effortlessly under your shell or performs solo on warmer days. With responsibly-sourced materials and Fair Trade certification, this isn't just high-performance mountain running gear – it's outdoor apparel that aligns with your values while elevating your trail experience.
Features
Natural temperature regulation and odor resistance from merino wool construction
Enhanced durability with nylon core-spun fibers
Articulated patterning for unrestricted mobility
Fitted profile eliminates bulk while maintaining comfort
Versatile layering capability as base or mid layer
Breathable and moisture-wicking performance
Responsible Wool Standard certified for ethical sourcing
