Ever thought your shirt would breathe a lot better if you just put a couple thousand holes in it? Mountain Hardwear has done just that with the Canyon AC. A nylon/poly blend is covered with tiny perforations that allow cool air to pass through. “I loved the breezy feel as we hiked in 85°F heat on a trail outside Pamplona,” says our tester. Key detail: The 1.5-inch sun collar saved him from neck burn on multiple occasions.