Update: kudos to @Athleta for making mastectomy inserts! They're

Renew Built-In Bra Tank A-C

Athleta Created Two New Sports Bras for Breast Cancer Awareness

Bra Inserts For Mastectomies

Renew Built-In Bra Tank A-C

Flat Mastectomy Tattoos

Empower Mastectomy Bra Insert

Bra Inserts For Mastectomies

Breast Form Bra Insert - Non-Surgical Breast Prosthesis - eighty

Bra Inserts For Mastectomies

Empower Mastectomy Bra Insert