Not too thick, and allows a better feel for surfaces. Much better for when outside in the summer - keeps my feet cool. I have size 11 feet and many times with others, the sock slides down and causes an uncomfortable lump. These fit well and stay put and I believe that they would suit a range of foot widths (I have narrow feet). I would recommend these if you are interested in well-fitting, cool and comfortable socks. If you want a lot of padding then look elsewhere. These are wonderfully lightweight. So far they are holding up well. I have owned some Balega socks for that are still going strong after 15 years so hope these also last well. No issues so far and machine washed and dried (cold, low heat) so fingers crossed. They certainly aren’t cheap!