I store my bike outside and I leave on the coast. So I get a lot of dew most mornings. This is the ONLY cover that I have had that keeps the bike dry. It is not really meant for travel as it is LARGE. It will just about fill up an entire saddlebag by itself. It is designed more for weather protectin than dust. But it works great!

covers bike well and keeps dust and rain off...takes a few minutes to put on but well worth it if you park your bike outside

I guess if you had to store your bike outside this would be a good choice, but I found it a pain for occasional use when traveling. It does cover well, but was to time consuming to use all the time.