These shoes accommodate for both issues and keep me comfy. has an intersleeve to "lock" rack into hitch reciever BUT. This are the best flip flops that I ever put on my feet. I connected a faster charging block and it seems likes the charging time has functioned as normal. These two had it going on. Now I have two to ensure I am fully covered when my battery runs low. They gave a rough order of magnitude how loud each speaker is and even took a good guess at how far it was away from your listening position, but with a mono mic they couldnt really tell you if the speaker was too high or low or was too far to the right or left of optimum position or if the transducers were pointing right at you. Once done they were very comfortable with or without socks, and I have walked 5 miles off road in them no problem. The only drawback is that the cans are a bit heavy and they make the ears sweat. It is a waste of money.