Aurifil Calm Thread Collection 80wt 5 Small Spools Calm collection from Aurifil. Thread Kit includes 5 small 80 Weight spools. Thread Box includes five spools (300 yards each) of Aurifil 80wt 100 percent cotton thread. Colors include: 2000, 2021, 2370, 2615, 2625. CHK-AC80CC5