From Rowan’s website:
Recycling is becoming increasingly important in a world coming to terms with the challenges of environmental, economic and climatic change. Rowan Purelife Revive is made from used garments which have been selected according to the silk, cotton and viscose content. These are then carded to make regenerated fiber, which is then spun into this beautiful, high quality yarn, which gives life to new hand knitting designs.
Fiber content: 36% recycled silk; 36% recycled cotton; 28% recycled viscose (rayon)