Even though summer's heat is fading away and cooler fall air is taking its place, you can still work up a sweat when you're traveling on the trail. Whether you're hiking, biking, or running, you can stay cool and dry through high-output pursuits in the Patagonia Capilene Cool Trail Long-Sleeve Shirt. Made of a comfortably soft yet high-performing fabric, this versatile long-sleeve has been engineered specifically to maintain breathability and moisture-wicking performance when temperatures and effort levels rise. It's also got raglan sleeves with underarm gussets to comfortably increase your mobility on the trail, while a drop-tail hem maintains constant coverage as you move. Add on a scoop-neck design that'll keep your core cooler and well-ventilated and you've got an ideal shirt for those in-between temperature days.