I've only had these 4 weeks so I can't yet attest to their true longevity. But the price on Amazon is great. They are MUCH better than I expected. Much better and cheaper than the thermal socks Sams was selling.
  They seem to be holding up well after 3 washes in hot water. I also like that I could order a color assortment.
  I formerly liked the thermal Dickies boot socks they sell at Wally world, but they are really really tight unless you upsize, which walmart didn't carry this year)  I am super happy I tried the Falari.
  Of course, I was willing to buy clothes online only because they were really well priced and Amazon does seem to offer decent returns policy.
  I normally shy away from purchasing any type of clothing online because I can't touch it and feel the material or feel the sizing. I hate wasting my time returning clothes online,  it's a super pain.
  (Was severely disappointed earlier in the year to purchase from Amazon, some Riggs pants, like the ones I bought a couple years ago at VF and they changed the material to something disgusting like canvas. It was like wearing sandpaper! Had to send them back...took 5 wks to squeeze a trip to UPS into my schedule, all the while worrying I'd get stuck with them if return time ran out. Just not a fan of online clothes shopping. Sorry, I just don't get it)