Long story short, I went on a very tough elk hunt where I packed 80lbs of gear in and out of the mountains last year. Every day since then my feet hurt when I stand up after sitting for an extended period. The first 5 minutes of walking have been very painful until my feet seemed to loosen up. I ordered a pair of these high dollar inserts thinking surely it's another gimmick but with a 90 day guarantee what the heck I'll try them. After the second day of using them in two different pairs of boots, my foot pain is 95% gone. Unbelievable. I'm sold. I wish I would have had these sooner and while I was in the mountains. I will eventually have a pair for every pair of shoes I own! Finally, a product that works!!!