Tall heel, custom moldable insole that has yet to be formed, stiff outsole with vibram megagrip, gore-tex. These are made for some serious rugged hiking. I bought these because they were billed as a men's 10.5, but they are ladies. The tags are still on and they're in like new condition. Insoles are just a hair under 10.75" long, the second photo with both insoles the angle makes them appear to be 11".