I realize most folks will be buying these for use in cold climates. I can't comment on whether they work well in the cold. I will say that they are comfy and stay on pretty well. I put them on - and it's no muss, no fuss - they stay on until I take them off. I have not noticed a marked decrease in hearing ability with these cuffs either. Very nice product, just as described and seems well made and I like the price point as well ($12 for the color and size I got). I have not washed them yet. I got the medium size, but I think I will order another in a larger size since my lobes get rolled up a bit in the medium cuff.

I will share how I use these, in case it helps anyone else out there. I use these to keep my ear warm, but not in cold weather.  I have a chronic vestibular condition which causes my ears to ache a LOT. So, when I have ear pain, I put one of these cuffs on my ear to get some relief.  This works much better than using a hot compress or warm (not hot!!) heating pad next to my ear. Again, I just put it on, and it stays on until I take it off. So, if you or your little one have ear infections or ear problems and want to keep the ears warm, I would definitely suggest you give these a try.