From the patagonia site: "Add a pair of lightweight performance pants to your trail kit with the Terrebonne Joggers: breathable and quick-drying with a comfortable waistband and cuffs, and a bit of protection from the elements, thanks to a durable water repellent (DWR) finish made without perfluorinated chemicals (PFCs/PFAS). They’re perfect for the trail, bouldering or yoga."