The rubber is of nice quality, but the sizing is weird. I normally wear a 6 or 6.5 in regular shoes. In any open toed sandals, I can wear a 6, and with flip flops, I can definitely fit a 6 or even 5.5. I heard that it runs a tad big or normal size, so I order a 5/6 thinking that it will fit me fine, but it actually fits a little shorter than I would like. However, the strap is really loose.. which is weird because I tend to have "fat" feet.. My feet are wide. So, bottom line is, the length of the shoe is shorter than I thought, but the strap of the shoes are longer (fit for bigger feet). So, I would be screwed if I order a size up or a size down! I wish I could love it, but I don't. The good thing is that I asked for a return and Amazon just refunded me the money without me having to ship it back. I guess shipping it back causes more hassle for them. So, that works out for me and I'm grateful. Thank you.