It is snug with regular thin socks. I should have returned them but I didn’t fully realize how loose they were until I wore them outside the house. I bought this mouse about 3 months ago and it was great loved how you could change to polling rate with the software. Por ejemplo que no enciende o no vuelve a tirar luz, pero no es así! The fit is perfect, thickness is unbelievable, and the comfort is awesome. but crocs are like little hugs for your feet! this brand has an ex back with straight straps I might try next. You need a dremel tool to cut out the area on the current roof ditch rails using the red cut outs. Lastly, theres a way to connect through a USB port. Maybe they think since theres 2 slots for the straps times 2 bikes still leaves me with 1 extra??? But its not that simple.