We searched the globe looking for the finest cotton in the world and found it in two areas. For our 350 and 560 (280 2-ply) thread count sheets, we use cotton from the Annur region of India. India produces ultra-fine, long-staple fibers, which are twice combed and ring spun into silk-like fine yarns. For our finest 500 thread count sheet, we use Supima cotton grown 100% in the USA. Supima cotton is known for its strength, softness and color, producing a smooth and supple weave.