Firstly .. thanks for such fast delivery and easy shopping!! i love the funky design.. will be easy to spot on the conveyer belt. We have only used one of the smaller pieces for a couple of trips so far and have been able to carry it on. The ulitmate test of course will be when we use the bigger ones that have to go through the "luggage handling " at the airport . And with this material they are made of we will not have to worry anymore when the airlines leave our luggage out all night because of delayed flights and deliver next day to us soaking wet.