I just returned from a trip to San Francisco. I have been using space bags for luggage packing for awhile now and it really paid off on this trip. I use them for space saving and for ease of inspection. On this trip it was pouring rain in our layover city. Apparently the luggage was exposed to the rain for a long time during transfer. The bag was soaked on arrival at the destination. But luckily with the space bags, everything I packed in them was dry. The only things I had to dry was a couple pair of socks that I had in a pocket instead of a plastic bag. I was so glad I had used them on this trip.