The PrimaEXTENDER is made especially for: those who want to vary the compression of their HuggerPRIMA women who may have variable cup and body sizes with lymphedema, post-surgical swelling, etc. and want flexibility to adjust the fit women who are post-surgical or in lymphedema management that need compression 24/7 but would like a bit more space for sleeping or warm weather or to accommodate for swelling/ bandages/ compression padding anyone who wants to adjust the size and fit of their HuggerPRIMA without having to buy an extra bra:) Features Key features of the HuggerPrima Extender include: Easy to zip in & out of the HuggerPRIMA “Extends” the size of your Hugger Antibacterial, moisture wicking & durable Easy care: machine wash & dry Materials Materials for the HuggerPrima Extender include: 90% Nylon 10% Spandex Plus, it is: Latex Free Velcro Free Antibacterial Wire Free Moisture Wicking OEKO-TEX Standard 100 Certified - Skin Safe