What Our Gearhead(R) Experts Are Saying: "I love this shirt for summer hiking because it breathes incredibly well and dries fast. The UPF protection saves my shoulders on long days, and the straight hem makes it super easy to wear untucked. It's lightweight, tough for how thin it is, and way more comfortable under a pack than most button-ups." We turn to the AirExchange Novelty Short-Sleeve Shirt when the heat is rising and the trail keeps calling. Marmot's AirExchange fabric brings breezy breathability and fast-drying comfort, helping us stay cool from sunup to sundown. With UPF 40 sun protection woven in, it's made for exposed ridgelines, open desert days, and summer hikes where shade is hard to find. Flat-felled seams enhance durability and feel smooth under pack straps, while the camp collar and straight hem keep the style easy and relaxed at camp or on the move. A handy drop-in chest pocket stashes trail essentials like sunscreen, sunglasses, or lip balm. Whether we're scrambling, exploring, or cooking up breakfast outside, this shirt seamlessly blends trail performance with all-day comfort.