We bought these for a winter trip down south.  We went white water rafting, hiking, swimming and more.  This was the first time either of us had worn them and they were pretty good.  I would recommend socks for a little extra buffer if you are not used to them.  I got a size 8 and felt they were true to size and stayed securely on my feet.  My husband got a size 13 and they were a little short, the curve was a bit severe but still a good sandal.  I still feel safer in hiking shoes and these were a little slippery when wet but dried quickly and impressed me.