I can't buy a new pair of shoes w/o buying a set of these insoles, too. I put them in everything -- light running shoes, trail running shoes, golf shoes -- you name it. I have a super-high arch and this keeps my feet from collapsing inward. After just a few days they feel akin to custom orthotics. Beautiful! Also, FYI, the Backcountry sizing chart is spot-on right.