Shouldering a pack on a hike usually feels like a chore, but that’s not the case with Arc’teryx’s Aerios 18. This innovative daypack includes a patent-pending interchangeable harness system that allows you to adjust the fit for maximum comfort, and its streamlined design reduces bulk. Even so, it can house a ton of gear, including a hydration reservoir and trekking poles, and the durable Cordura nylon body and DWR exterior finish ensures your stuff stays protected no matter where you’re headed.