This is Rowan Purelife Revive in shade #462, Basalt.It is a mid brown shade flecked with caramel, black and off white. All Revive is now discontinued.
The yarn is is made from used garments that are recycled to make a fiber which is then spun into this yarn.
The content is 36% recycled silk, 36% recycled cotton and 28% recycled viscose. There are 137 yards per 50g ball and it knits as standard DK.
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