Any safety razor scrapes away unwanted hair along with natural skin oils & the outer protective layer of skin - the epidermis. This is what causes the all too common shaver rash, itching, red bumps, skin dryness or tautness and ingrown hairs. In the case of the personal electric shaver, the blades should never touch the skin if the foil pattern is correctly designed. The skin surface is not scraped away & shaver rash, red bumps, skin dryness or ingrown hairs are never a problem.