When it comes to body shaping products for FTM transitionaing men, nothing comes close to the Tri-Top chest binder by Underworks. Three powerful layers of medical industry grade 70% nylon and 30% spandex throughout the front, and a single back layer, provide maximum comfortable chest binding. Mid-tummy length. Tested and effective in full binding and for sporting related binding and protection. Made in the U.S.A.