Though convinced a size down would be too tight but cbb for returning wellies to check! Muy cómodos y fáciles de limpiar. Dont be fooled there is no USB dongle and these are either Bluetooth or direct connection on a PC. Theyre not the most comfortable reefs Ive had. My son has run, jumped and played all summer long in these sandals. I liked the sleeves as it was a November event with temperatures in the low 40s F. Wont dissapoint! I am hoping they loosen over time as that is usually why I replace them. you cannot take the cord and plug it into a USB port! My son loved this mouse.