Multi-blade razors are designed to shave below the surface of your skin using a "pull and cut" method called hysteresis. This causes razor burn, bumps and irritation. The Single Edge is designed to shave at the surface of your skin, providing a close, comfortable, and irritation-free shave. We're so convinced you'll love the single blade shave that we offer a 100-day trial, and free shipping + returns to the US. You've got nothing to lose - give us a shot today!