APPEARS STURDY AND FUNCTIONAL
Sturdy vinyl - Not flimsy.  Gusseted.  Zipper and zipper pull appear to be of good quality.  Perfect size and shape for my gym bag and my 360 wheeled underseat carry-on.  If you pack your personal care liquids and gels in the appropriate sized containers, this bag will hold what you need for three weeks of travel - even if you're high maintenance.  Not sure if it is truly TSA compliant but it looks the part.  *Mrs. R. Fields*
Rating: 5 stars