Nylon is one of the strongest plastics we use in our products. When we need a super-lightweight fabric, nylon is vital for its strength. But nylon is a petroleum-based material, and producing it has a high cost in energy and greenhouse gases. Incorporating as much recycled nylon as we can lessens our dependence on virgin petroleum as a raw material source, helps eliminate discarded material and reduces greenhouse gas emissions from manufacturing.

An important fiber in Patagonia's line, polyester allows them to build lightweight materials that dry quickly and can be used in a variety of applications, including trail-running tops and yoga tights. Polyester also blends well with natural fabrics like cotton. But virgin polyester is derived from petroleum, which comes at a high environmental cost.

Spandex is a critical material in our products. Also known as elastane or Lycra, spandex is an elastic polymer (a type of plastic derived from petroleum) that makes garments and trims stretchy, which allows them to be formfitting and to provide freedom of movement. Unfortunately, extracting and refining the petroleum used to make this material pollutes land, air and water, and contributes to global warming.

Water repellency doesn’t just keep you comfortable, it keeps you alive. But for decades now, the coatings used in apparel to improve water-repellency have relied on per- or polyfluorinated chemicals, which contain fluorine and are most often referred to by their acronyms: PFCs, PFOAs or PFAS. This class of “forever chemicals” accumulates in air, water, food and even our bodies, and they raise serious health concerns, according to the Environmental Protection Agency.