GOTS (Global Organic Textile Standards) certified imported organic cotton. Silky smooth and soft. In natural, unbleached, undyed or hydrogen peroxide whitened. Although USPS Priority Mail is the only shipping option you will see when you checkout, this item may ship by UPS. Please let me know in the comments of your order if that would be a problem. P.O. boxes will always ship by USPS Priority Mail.This item cannot ship by First-Class Package International Service.