I put spenco total support insoles in my work shoes I stand on my feet all day and sometimes stand in a small area for 20-30 mins at a time which puts more stress on your feet then when your walking around. Anyways I tried them in my 2 year old shoes that already had dr scholls memory foam inserts in them.
Took out the old soles and the spenco total supports are by far the best insoles i have tried to date much better than the 3 or 4 other dr scholls i have used. I also got a pair of spenco gel insoles but these polysorb total supports are much better. All my foot pain and aches have gone away after 6-7 days of using the the total supports.
William