I first bought these a couple of years ago, and found my husband kept taking mine to pack his things. He liked the fact that he can put 1 or 2 changes of clothes in one and put that in his carry on, "just in case" our luggage is lost. I like them for the fact when customs needs to open up our luggage & check, nothing falls out! It is also great for organizing! We loved these so much I bought another set, then another and now we are the proud owners of 4 sets, and we use them all, plus we got them in different colors to organize. Then one of our adult children saw ours on a visit and wanted a set for Christmas. There went the 5th set we bought.
I used this on a recient trip and was able to pack several days of underwear in the smallest pack. It kept everything orginized in my suit case and I could easly get at each one with out digging through my case and without unpacking everything. As the trip progressed I was able to put dirty clothes in one and kept clean ones in the other packs. Several Friends has purchased based on my experience. A Great Idea and of high quality.