Specifically ordered these because of the claim that they were made from ripstop nylon which is tough as old boots; disappointed when they turned out to be 100% polyester.  
They are however, correctly sized for 2 3/4” shell boxes (something others still seem to struggle with), fold down compactly and drop into my range bag perfectly. 
Little expensive for something so simple made from inexpensive materials at $47 for the pair including shipping when bought directly from Boyt.  Fit my purpose so keeping them. Be interesting to see how they last.