From the innovators over at SWTC -- Therapi yarn -- you'll love how this yarn feels and knits. 30% Bowlder (Jadeite) Fiber, 50% Fine Wool, 20% Silk; Hand wash/lay flat to dry. Do not iron. Tension/Gauge: 5 sts = 2.5cm/1” 4.50mm/US 7 needle; 100m/50g ball. One ball makes the tea cosy (along with some oddments from your stash for deco).