As you know, I purchased these for myself and my husband several years ago. After wearing them daily for that length of time, we were ready for new pairs.
My husband wears his to help with joint pain and I wear them for that and the nubby ones for driving so I do not have to grip the steering wheel so tightly.
He wears the XL and I have all three sizes to use depending on the activity I am undertaking .. large nubby when driving so I can wear them for longer periods of time. The others we usually wear for about 20 minutes at a time.
Love them and your company and your excellent customer service.