Profoot's dura-soles are designed for men who need a tough, long lasting insole. This product is 100% USA made with advanced military-grade construction that's built to last. With unparalleled arch support and gel zones in the ball of the foot and heel area that help absorb shock. Featuring Silverplus anti-microbial protection for all-day odor control. These insoles are guaranteed for 1 year or your money back. Trim to fit men's size 8 to 14.