We discuss Double Edge (DE) razor blades as used in vintage and modern safety razors. Learn how DE blades are made and the variables that can affect their performance, including the materials used, the type of coating applied, and the quality of edge grinding and polishing. By recognising the differences between "comfortable" and "efficient" DE blades you'll be able to determine the best blade for your needs factoring in your facial hair and skin type, the design of your razor, and your shaving frequency. Find the DE blade that works best for you and some advice on improving your shaving technique to reduce irritation.