Sandals are very casual footwear and not appropriate for business wear. There are also safety regulations in some businesses that prevent the wearing of any open toed shoe. Besides this, even "dressy" sandals convey an image of a relaxed carefree lifestyle and not a professional image. Sandals are footwear designed to be worn in spring and summer. The biggest problem with sandals is accumulated sweat, as it has the power to discolour and eventually destroy most shoe fabrics. To combat this you may want to treat new sandals with water and stain protective spray for leather.