Sustainability has been slow in reaching the running market, but Patagonia leads the
way with the , which is as comfortable and fast-drying as any shirt spun from virgin fibers, despite being made of 30 percent recycled polyester. It's built from soda bottles and respun scrap fabric, and at the end of its life it can be recycled. Bonus: It has an SPF 15 rating.
$59, patagonia.com