Top ties around neck and back. Thong goes on in one piece. Both pieces tie with clear "invisible string" elastic (you may need to tie it off for your perfect fit).
Please note, these sets fit similar to micros (cups are a bit larger though), and especially because of the invisible elastic- you will look as near to naked as one can while still wearing something. Say your prayers and make your peace with this now, as no exchanges or returns will be granted due to not liking the fit.
