Many running shirts these days are 100% synthetic fibers to get the lightweight “tech” material that we like to exercise in. Polyester is made from the polymer PET, which is also used to make things like soda and ketchup bottles. It is not a far stretch, then, to recycle soda bottles into clothing! Headsweats has done just that by partnering with the global textile solutions provider Unifi to make a clothing line out of REPREVE®…