A soft & beautiful delight, Cascade ReBound is a cotton blend yarn. Blended with what? Recycled PET, with about 6 plastic water bottles worth of plastic being recycled into each skein. You will be surprised by just how smooth and soft this yarn feels with a backstory like that! It doesn't hurt that all the colours are lovely, modern and go great together.
The ball band recommends hand-washing and laying flat to dry for best practices.