Arc'teryx Sunna Crew Shirt LS

The Sunna Crew Shirt LS is a technical long-sleeve tee designed for high-output days in warm mountain terrain. Its lightweight recycled-polyester waffle fabric moves moisture away from the skin, dries quickly, and stays breathable when the pace picks up. Four-way stretch supports unrestricted movement, while gusseted underarms and low-profile thumbholes keep the shirt secure during scrambles, traverses, and approach hikes.

Whether you're heading out for a hot trail run, a long hike, or a day at the crag, the Sunna works as a comfortable next-to-skin layer that helps you stay cool on the move. The longer back length is harness- and pack-compatible, so it stays covered under a hipbelt or harness. An antimicrobial finish helps control odour on multi-day outings, and the quick-drying fabric is easy to rinse and repeat.