Don't buy this air doll. While it can be sexy and attractive to have an air doll with feet in this position, its limit the position you can take with it as the ONLY one you can see in the image.
Don't even try to lean on it on a bed as the material is not resistant enough to resist even 65kg weight on it without the air part tearing on the places it was merged together, particularly the 'around the pussy' part.
What about the position possible, would you ask me? Well, the trickiest part is that this position play with the weight of the girl sitting on your dick to bring it even deeper inside but... And I think you already get it... This is a air doll, something used more for the form than for something like an hand-free masturbation. There is no weight to play with.