London’s venerable Savile Row was transformed into a country fairground on Monday as sheep frolicked in the streets to herald the start of Wool Week. Amidst the fluffy conflagration stood (or perhaps more accurately, sat) a pair of curved-back slipper chairs, clad in a new textile derived from wool and recycled Starbucks coffee sacks. Dubbed “WoJo,” a portmanteau of “wool” and “jute,” the material was first conceptualized by The Formary, a New Zealand-based design company, then manufactured for the Frappucino purveyor in collaboration with U.K. weaver Camira and Wools of New Zealand.

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Turning coffee sacks into chairs—a process that spanned 18 months—required some mental calisthenics: One of the biggest challenges was keeping the jute fibers from shedding. The solution came to Bernadette Casey, director of The Formary, after visiting a felt exhibition in New York. “It occurred to me that the perfect way to reduce the jute shedding was to blend it with wool,” she says. The more I thought about it I was convinced we were onto something. And so we began experimenting with wool and recycled jute in a number of different applications.”

Another hurdle was finding the right partners for the job ahead. The Formary picked Wools of New Zealand for its sustainably farmed Laneve wool, and Dell’Orco & Villani, which manufactures textile-recycling equipment, for their technical know-how with recovered fibers. Working with Camira made perfect sense, as well, since the company was more than familiar with operating with baste-fiber upholstery.

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WoJo, which is currently on view at Starbucks’ flagship Conduit Street store in the West End, will be gradually introduced in a range of Starbucks seating. For their efforts, Prince Charles’ Campaign for Wool and the Society of British Interior Design have granted Starbucks and The Formary the Sustainable Production Innovation Award.

+ The Formary

+ Starbucks