I use D. Scholls,but use the ones for Plantar Facitis(sp) if your heels are hurting. I have them in every pair of boots,shoes, slippers I have It has worked wonder. About $12/set.
They are thicker in the heel area because of the padding needed and have more arch support which you need for the Plantar Facitis.They also have them that are 3/4 length for use in dress shoes or tighter fitting boots