These shoes are one of my favorite pairs (and I'm VERY picky about my shoes). The open side mesh is perfect to allow water to drain if you're in a wet area while still providing comfort and non slick soles. I've never been disappointed in Columbia items and this time is no exception. I ordered the size I normally wear in Nike shoes and they fit perfect. I will definitely be purchasing more of these in the future to wear boating. You won't be disappointed in these!