Have cute low-back clothes sitting in your closet, but don't want to be tacky by showing off your bra? With some elastic and bra hooks, you'll be wearing them in no time :).
Make sure the hook/eye set matches up with the bra you're using; if your bra has 2 hooks, find an eye with 2 hooks.
You can these for cheap at your local discount fabric shop.
Makes sure the elastic is the same width as your bra strap and hook/eye set.
Sew either the hooks OR the eyes to one end of the elastic.
I like to keep the elastic on top so the raw edge won't chafe.
The type of stitch shouldn't really matter since you're not sewing in the direction of the stretch (just make sure it's securely attached).
Put your favorite bra on, and attach the bra's hook to the eye on the elastic. Wrap the elastic around your waist once; imagine where the elastic would attach on the other side of your bra and mark it.
REMEMBER: This has to be tight enough to provide support--it is just an extension of your bra back, so you don't want it to be loose.
Sew the remaining hook or eye to the place you marked on your elastic, and trim the remainder. Make sure you sew on the correct sides--if the hook is facing up, the eye will face down. Try to keep the raw elastic edge on the side that won't be in contact with your skin.
Put it on and show off your low-back clothes!