I think this is the first sight unseen product I've been disappointed with.
The picture was not accurate and alot darker than anticipated.
The soles have a polyester coated nylon, I can't imagine you would not slip.
It was a last minute Christmas gift so I wrapped them in hopes of the best because the reviews were so amazing.
When my guy tried them on...the foot fit was fine and comfy but lots of ankle room and didn't feel secure.

He really loved them. Nice quality on the uppers. Nice support, padded insoles. And very light as reviews said.
But if it doesn't fit.. try again.