Was looking for new replacements to the ones I had for years and were wearing out.  My "go to" store didn't carry them anymore and finally found these.  Almost like my original ones. Long enough to stay ON my foot (some I have tried and returned barely even covered my toe cleavage and then you ended up walking on the band right on the front part of the ball of your foot). I guess manufacturers don't get that the majority of people do not have extra small feet so the "one size" fits most" does not apply there.
I always wash in a lingerie bag on cold water and air dry.  After awhile the little rubber cling dots start to break down or come off but I am a heavy walker so the friction probably as a lotto do with that.  I also think the shoes you wear have a lot to do with it too. For example, a pair of mules compared to a full pump will get more wear because you are gripping differently with your foot to keep your mules on. JMO.