Eau de Cologne (or simply cologne) contains 3-5% of aromatic ingredients dissolved in usually diluted 70% alcohol, making it a significantly lower concentration than for instance an Eau de Parfum.
This type of product is often sold as an after-shave splash because it's less likely to irritate sensitive skin, however there are also Eau de Cologne products designed for women. Notino offers Eau de Cologne by many popular brands including the most famous one, 4711 Original.