Hugh G.wrote a review of Smartwool NTS Mid 250 Pattern Zip Top - Men's on March 21, 2016
Out of curiosity and in an effort to test the technology, I have worn my mid-weight 1/4 zip top for 20+ ski days dating back to January 2 WITHOUT washing. After skiing, I simply hung it on a hanger on my closet door to let it air and dry. I wanted to see how many times I could wear it before it became smelly. I am happy to report--it still smells fine (I did wear antiperspirant/deodorant each ski day), and it is still very comfortable to wear. It got a little salty while skiing in Spring-like temps at Snowbird in early March, but it smells fine and feels soft. Love my Smartwool.