I have used my mocs for several years now and have actually worn the wool out inside each moc under the ball of my foot. I have installed wool sole liners from my Maine hunting boots and they are still wearing great. I have worn them outside in cold wet weather and they have been wonderfully warm. If I ever manage to wear them out I will purchase another pair.
Ordered these for my husband and he just loved the fit, feel and look of the slipper. He says they are the most comfortable slippers that he has ever had.
I'm 72 years young, work out at a gym 3-4 times per week- early. One day last week I jumped out of bed, put on my gym clothes, & my mocs, run downstairs, into my car w/ my gym bag, motored to the gym, got there only to realize I was wearing my moc's- they were so wicked good comfortable!!!!!!!! Fortunately I had sneakers in the gym bag. OH well.