Why do my straps keep falling down? I'm getting tired of having to adjust them all the time.
Try tightening the straps. Straps should be adjusted only enough to give support to the bust without cutting into the shoulders. If the straps are falling down, you may not be filling up the cups. Try a smaller cup size. If coupled with a band that rides up, you may need a smaller band size. Check our Find Your Fit: Bras guide determine if you are buying the right size for you.
If you have a problem with perpetual falling straps, you may want to try a different style of bra, such as a T-back, U-back or racerback style.
Having said all that...if you have an old bra where your adjustable clasp doesn't hold the bra in place, all of the above does not apply to your situation. You, my friend, need to invest in a new bra.