Optimized Fit For Work Boots: Built with the highest quality materials, M-100 Elite insoles maintain their supportive structure for up to a year. They are the most cushioned and supportive model that Protalus offers. These insoles provide long lasting comfort through Protalus’s patented alignment technology, making them perfect for your toughest days. Patented Alignment Technology: All Protalus insoles optimize your body’s alignment by featuring the deepest heel cup on the market. This design holds the heel in place, preventing excessive inward or outward movement, relieving stress on your feet, ankles, knees, and hips. Dynamic Arch Support: As you walk, Protalus insoles stabilize your ankles and guide your feet to their natural position. This allows your arch to move efficiently, relieving stress throughout the body. Optimized Weight Distribution: With every step, up to 5x your body weight is exerted on your weight-bearing joints. Protalus insoles help evenly distribute this pressure, reducing strain on your joints and feet. Lab-Proven Relief: At Protalus, we have based our unique insole design on 50+ years of medical research and third party laboratory testing. It's no coincidence that over 95% of people who try Protalus have positive results, it's by design. Protalus M-100 Elite insoles are recommended for work boots. The M-100 Elite insoles are proven to correct over-pronation and deliver long lasting comfort through Protalus’s patented alignment technology. These durable insoles are made to last up to a year and feature the deepest heel cup on the market. Engineered for peak performance, the M-100 Elite offers Protalus’s maximum cushioning and support.