I had early blister onset on my heel from a 15km hike. I used ENGO heel pad and instantly resolved the issue by reducing the friction point and the following week did the same hike with no issue. The only issue I found was as it was for boots, when I put one of my boots on my sock caught the patch and it delaminated a bit on one foot. This is as more of an issue with placement on my behalf as the other boot was fine because it was a fraction higher and my heel didn’t make contact with it upon putting on the boot. The patches definitely work as advertised however in eliminating blisters in known hot spots snd friction points