I'm a nurse on dialysis so I need non-slip waterproof shoes that are good for long hours on my feet and crocs won't cut them. It is wonderful! These are men's sizes and I usually take a women's size 10 and based on the reviews that said they are large I took a men's size 7.5 and they work fine but are a bit large. They're wider as they're men's sizing, but they're perfect for me, plus there's room for arch support insoles. Great so far!