FSC-certified viscose mid-length spaghetti-strap slip dress from There Was One featuring black, satin weave, square neck, spaghetti straps, flared hem and mid-length. POSITIVELY CONSCIOUS: This Planet Conscious product contains materials certified by the Forest Stewardship Council (FSC) or the Programme for the Endorsement of Forest Certification (PEFC), which ensure that the wood used comes from responsibly managed forests..