Didn't have to zip and unzip often, so I can't say whether the zip will hold up with frequent use. However, they are perfect for the reason I bought them because they were dusty/organized in the closet during the off-season. I'm not a big air traveler so I have no idea how this would work. They feel sturdy, aren't torn, and I put a few more things in than advertised. The only downside is you can't really see what's really inside, although for my purpose of just storing it it doesn't matter as I won't be seeing next summer's clothes for 7 months. Worth the price and I'll get more of these than some of the other more expensive ones I've bought.
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