okay , I wear these thing sail dinghy all the time . I race Flying Scots and Lasers . in the sun , these baby get pretty hot . Whats more , when I do a beach launch of a Laser -lrb- I just get back from Crete - sailing in the Aegean Sea in a Laser -rrb- these shoe fill with sand and I be too busy sailing to stop and empty they over the side . you see , competitive racing in a dinghy do not leave heap of time for such muck about . moreover , in a Laser , a 505 or a similar athletic dinghy , you be likely to end up swim if you leave go of the rudder or main sheet for even a moment in a breeze even if you think you have get the boat in iron . there be not time to dork around with such thing . on the positive side , these stick like glue to a foredeck . I be on foredeck of a Scot the other day fight with a out-of-control spinnaker in a breeze with the lee rail under water and the deck at about 30 degree . my foot be not slip at all ! it be pretty amazing really .