Do it green...Hemp goes Hip... Tropi-Ties has created this sexy bikini out of renewable and sustainable resources: hemp, cotton and bamboo. Butternfly top has a bamboo ring center, rows of cotton fringe across the front and strings that pass through the side to tie around neck and in back. Bikini bottom has bamboo rings at the sides and offers moderate coverage in back. New, from the 2008 Tropi-Ties Signature Collection. Arriving Soon.