I purchased both colors in size 13 for my two college bound sons to use in the showers at their house/dorm.  They fit true to size and both boys commented on the comfort and stability of the shoe.  They are much sturdier than the typical "flip-flop" style shower shoes you can buy for a few dollars anywhere and since I got them on sale were not much more expensive. The out-sole is designed for use in wet areas so they grip when wet.  We have bought many Adidas slides/sandals over the years and these are perfect for the use the boys plan to put them to.