This bedding set contains fitted sheets that don't come off or slip off the corners because these sheets have extra elastic. The sheets will not shrink and there's no ironing needed. They are very breathable and cooling and they don't trap heat. These CGK Unlimited sheets are allergy resistant and hypoallergenic since they are made of microfiber yarns (otherwise know as polyester). They'll keep you cool so you don't need to worry about night sweats. These high strength microfiber yarns are super soft and comfortable.