From the BMFA web page:
Gaea is a 4-ply yarn made from 21.5 micron Certified Organic Merino from Argentina. It’s combed in Germany and spun in the U.S., both mills certified organic. I love the whole world aspect of this yarn. It has a lovely hand. It’s as much of a dream to dye as it is to knit.

Note: Some older skeins of this yarn were tagged as 740 yds / 676 m; 560 yards is the correct yardage.