Duni Gredin Bikinitrusse Hoj Folde 22Gredin bikini bottom from ERES' Duni series. The Gredin bikini bottom is high waisted and can be worn in many ways. The bikini bottom has extra fabric that is foldable so that you can fold the bottom up to the edge of your bikini top, so you almost have a swimsuit, but it can also be folded down to a mid low waist height or simply worn at belly button height.