Here is the video explaining how I made my backless bra to wear with my open back dress I hope this helps and lmk if you try it! #forthegirls #openbackdress # How to Sew Bra Cups into a Dress Our Daily Craft How to Sew Bra Cups into a Dress Our Daily Craft Lets talk about one of our favorite little secrets, bra keepers! , We sew them into strapless dresses to keep your bra or shapewear right where it should be. No slipping, no tugging, no stress.