O'Neill Demi Dress . Our O'Neill women's Demi Dress is the versatile piece that completes your summer wardrobe checklist. Product Details: Woven Tank dress. 100% cotton gauze. 33 1/2” length from HPS. Lace trim insets. Drawcord waist. Double tucks at hem. Button closure at CB bodice. Self covered buttons. Metal logo badge.