In our wet Winters this way wouldn't be very good. So I started to make felted clogs and booties with the rubber soles for outdoors wearing. I was looking for best solutions and found out, that soles for felted boots should have a high edges. Such edges are necessary for two reasons:
1. wool felt is not so stable like for example a leather or sheepskin, so it should be put in a deeper sole in order not to lose the shape;
2. felted boots should be stitched to the soles, glueing is not enough as felt can peel off while wearing together with the soles and glue.
I do not put any insoles, but shoemaker, who adds soles to my felted boots, puts necessary underlays between the soles and the felted shoe. So the feet touches only natural wool felt, like in felted house clogs. But shoes also they can be worn outside thanks to a high, water and cold resistant soles.
You can find rubber soles and other shoemaking materials for yor own projects in my Etsy shop with a section of supplies for shoemaking