Very breathable too. As for the mouse and keyboard well what can I say. They fit exactly as sized and I had no unsteadiness or sliding forward into the toe. These shoes are simply fabulous. Maybe later they will update the software . If youre buying these to use at a local gym where they have their own clamps (or clips, same difference) Id recommend getting a funner or brighter color so no one thinks youre taking the gyms set! Just the right size, very light. I am the one really like bass. There is a thick layer of cushion and I think they will last quite a while. My recommendation for the seller is to eliminate the sizing guide (US S, M, L, XL, etc.