Super comfortable Sleep/Leisure bra... No undernust elastic! This Mastectomy bra is made entirly from domestic Cotton/Lycra fabric! It will not hold a silicon form, but f you are looking for something cofortable to wear under your regular night gown or PJs this is the bra to go to. It will hold any soft or leisure form and has convenient fron Hook & Ey closure. Very handy right after mastectomy sugery as well as reconstruction or reduction surgery, when nothing harsh can touch the scars.