Sustainability Matters: Keen to Use Coffee Grinds in a New Sneaker Line, Clarks Creates a No-Glue Wallabee Made With Only 5 Pieces + More News FN Staff April 15, 2021: The latest sustainability effort from Keen involves many people’s favorite way to wake up — coffee. The footwear company announced that it will use coffee grinds in a new line of sneakers that will debut in August. This effort, Keen said, is part of Detox the Planet initiative and will reduce the use of petrochemicals. Also, the brand explained it will diminish the amount of coffee grounds that make their way to landfills, where they emit greenhouse gas.