The Overnight pads are made with 100% certified organic cotton top sheet, now even cleaner and drier. They have a combed and carded 100% cotton core, which is more naturally absorbent. The pads have leak proof, yet breathable, eco-material backing. They are extra-long with wings for stay-in-place protection. All Organyc pads are individually folded and wrapped in a biodegradable biopolymer (Mater-Bi made from corn starch), which is also used for the protective layer. Certified organic by GOTS, ICEA and VEGAN OK