As if it could get any more indulgent -- an irresistible herringbone texture enhances the look and feel of this 700-count Supima duvet. We've always said it takes more than a high thread count to create truly superior bedding. This is no exception. Each thread is made of 100% American-grown Supima (a cotton so rare, it makes up just 3% of the US crop). These finer, smoother yarns -- combined with our highest 700 thread count -- make this duvet a luxury you'll look forward to returning to night after night. Supima is consciously sourced, American-grown cotton that's farmed to minimize environmental impact. The fibers are 50% longer than standard cotton, so yarns are stronger, softer, less prone to fraying or pilling, and hold color longer.