You can rise early to beat the heat, but by the time you're nearing the summit that summer sun will be beating down on you. Whether you're running or hiking, summer days on the trail can be unforgiving, but luckily for you there's the Patagonia Capilene Cool Trail Short-Sleeve Shirt. Designed to keep you cool and dry during hot trail excursions, this lightweight trail shirt delivers a solid balance of performance and comfort. It's got a soft polyester construction that feels like cotton but wicks like a synthetic, giving you next-to-skin comfort for summit lunches, while still drying and cooling when you need to work hard. This shirt is stretchy and mobile for greater comfort during activity, and features underarm gussets that enhance that mobility and help reduce chafing during long, steamy days on the trail.