I have a pair of the Simms with the vibrum soles with studs installed, no problems in the two years I have had them. I would recommend whatever you get to install the studs and use a wading staff, also not sure if its the studs or the tread on the bottom of the vibrum soles but I don't slip and slide on the river banks before I make it to the water like I did with the felt soles.

Rodney