I purchased these on a whim - I want to see if they lived up to the description. I have only had them since Feb 01, but they have quickly become my favorite socks. Not sure how they work, but they hae kept my feet warm when it's been below zero and kept them cool now that it is starting to get warmer outside. On top of that, I used to come home after a day at work and my feet would be tired and a bit sore, but since wearing the on a daily basis my feet are no longer tired and the cushion-y soles make my feet feel airy and comfy. So...buying more today. Oh, and they wash well if you follow the instructions to the 'T. Mine have not lost their cushioniness and they seem to always smell fresh, no need to add heavy perfumed soaps or dryer sheets. So today, I'm here to buy more cause they are on SALE!!!!