My undergarments almost in shreds because my favorite no longer available.....tried buying "one at a time" to find the new, greatest, perfect fabric, perfect fit.  There were many failures, but now success.  The fabric is quality -- not too thin, not too heavy and certainly not that "prickly" micro fiber stuff.  They do not "ride up" and the waist also "stays put". There are no "lines" showing when I wear slacks.  I plan to buy more to replenish my underwear stash now that I have found good fit and good quality.