Panties described as hi-cut are referring to the shape of the leg opening. Typically, high cut panties will have sides and leg openings that sit well above the top of the thigh, while still providing moderate rear coverage. This can be a very flattering style, elongating the leg with a clean uninterrupted line. Similar to shapewear.
Woman who prefer cotton panties don't have to forego the hi-cut style, because many brands offer 100% cotton or cotton blends in this cut. Cotton, with its hypoallergenic, breathable qualities is a great choice for women with sensitive skin. Hi-cut cotton panties with a touch of spandex or other stretch fiber, will keep their shape wash after wash.