This option is meant to be added within the first 12-hours of purchase for WM Dolls only if you did not select Ultra Soft TPE Gel Breasts and have reconsidered. Instead of a hollow breast, the void is filled with a gel-like TPE that provides a softer, more jiggly feeling. Only available for C-Cup breasts and larger. For more information on this new upgrade (introduced April 2020 - still in "testing" mode), please contact us.