I picked these so I could wash my bras in the machine. My thought was that it might be easier to clean the bras in the washing machine than by hand. It really is easier this way, of course, but it also cleans out more of the buildup out of the bras! I love it, just make sure you tuck the zipper into the zipper holder, or it can become unzipped and defeat the purpose. Only downside is it is a tight fit for a G cup bra.