I have just gone through and extensive testing of just about every
footbed out there to customize my REI Spirit III's. They came with and
awful hard insert that worked the ball of my foot into a bruise. Tried
some other footbeds made by shock doctor purchased from REI and they
were good on cushioning but were too thick ( used for 10 miles took
them back for refund I love REI ) Bought some memory foam deals from
Longs Drug store and they were too soft ( my 200 lbs was more than a
match for them) Although they were very comfortable, they were too
soft. Finally found these "2 oz Miracle" insoles sold also at Longs,
and they have been good so far. I have had to shave them down ( under
the arch area along the outside of foot) but they are the best
compromise between too thick and not firm enough. I have tried ( at
the store) most of what REI sells as far as foot beds go but for my
foot these 2oz Miracles ( $7.90 us) have been the best solution.
Funny, the more expensive footbeds all seem to have fallen in the gizmo
category. They all promise things that they don't give ( for me that
is) . My boots are sensitive to heel placement and I have a limited
amount of heel lift ( given by particular footbeds) I can work
with...too much and I get awful blisters.
So the answer to the op's question...the cheaper guys. Although the
Sole's made or advertised by Ed Viestur (REI) are the cat's meow but
for me they were too thick...nice and cushy though.
J