The best method is to use heat and once heated to flatten or bend the pad to the shape you are looking for. Heat is needed to change the foam’s memory otherwise the foam just goes back to its moulded shape. The P2 and P3 have entirely foam padding. The P1 has plastic in it so the bending can be tricky but should still work. You can heat the foam a number of ways. Try a hair drier or hold it close to a radiant heater – don’t let the foam smoke and make sure you heat both sides. Once the foam is heated strap it onto a shape that will give you your correct leg size. You can use your leg but be careful that you do it over the top of your clothing (so you don’t hurt your leg with the heat). Use a couple of belts to hold it onto your leg. Leave it there until it cools (say 15 minutes).