We have carried kayaks at highway speed with no issue. I am very happy with them. Seriously though. Otherwise I love them! Solid sole/support. The logo and name are debossed on the top and the Micro-USB charging port is on the back just under the lid hinge. I found highs to be a tad shrill, but I was able to use the B&O app to bump the EQ a little into the "warm" area to correct for that. I found out that it did not have any mounting hardware included which makes it difficult to install since it needs a special type of hook to fit into the back side. ORIGINAL COMMENTS: I rated these as comfortable for a "couple hours" simply because I never wear shoes for longer than that at any one time, so I dont know how comfortable theyd be after several hours. 5-10-18 UPDATE.