These shoes fit true to size and are comfortable to walk in water and on land with. They are very breathable, but be warned - this means they also allow a lot of sand in.  I use them mainly for kayaking, and overall I am quite happy with them.  I am deducting 1 star only because I do not find them as comfortable barefoot.  I wear socks with them because otherwise I get a slight blister on my heel, and the upper material is a little rough on skin.  But if you don't want to wear socks,  a little body glide could do the trick.