What Our Gearhead(R) Experts Are Saying: "I wore this Merino Sun Hoodie on a weeklong desert trip, and it handled long hikes, sunny scrambles, and even post-adventure chill time. The lightweight wool keeps me cool, doesn't stink after repeated wear, and that oversized hood fits easily over a hat. Thumbholes and relaxed fit are clutch for active layering."We count on the Smartwool Merino Sun Hoodie when long days under the sun demand both protection and breathability. Featuring a recycled nylon core for durability and 100% merino next to skin, this hoodie's fabric keeps us cool, dry, and covered from peak to campsite. Whether we're moving fast on an exposed alpine trail or cruising red rock canyons, the UPF 40+ rating has our back. Its relaxed fit offers extra room without weighing us down, and the offset shoulder seams keep chafing at bay under pack straps. The large hood offers extra sun protection, while the thumbholes help keep sleeves in place and hands shaded as we move. From desert sun to high-alpine exposure, it's our go-to sun layer.