Product details:

The Patagonia Airdini Cap gives you the perfect blend of barely-there breathability and light weather protection that you need on long trail runs. Its main body is made with the same recycled nylon ripstop as Patagonia's wind-blocking Houdini shells, weighing practically nothing but keeping your head protected from blasts of alpine winds. It's also finished with a DWR (Durable Water Repellent) coating that'll shed light rain and other precipitation to keep your eyes and vision free from moisture. The side panels of the hat feature fabric from Patagonia's Airshed pullover, giving you a softer, quicker-drying, and more breathable feel where it'll be the most effective. A back stretch panel helps accommodate varying head sizes, doubles as a small stash pocket for your keys, and also acts as a stuffsack when you decide to tuck your hat away on the run.