The back's on these bindings are said to specifically fit a woman's calf, but I find them awkward to ride. They don't seem responsive or supportive. I've only been riding them for a couple of weeks, and their my first women's binding in seven years, so maybe I'm just not used to them yet. But, I'd check them out before you buy them to see if you're into those low backs. Other than that, their super light and comfortable.