At some point, I noticed that the replacement blades for a regular razor quickly become dull and irritate the skin. Since then, I switched to disposable machines and was satisfied. Tried many different ones. The data (multi-colored! 3pcs in a package) is optimal for me and is available in many stores. They last for a month - one and a half constant shaving of the 1st machine. I see no reason to pay more for replacement blades if I had enough of them for the same amount if not less.
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