An Eau De Toilette typically contains around 8-15% fragrance oil which lasts around 4-6 hours, in comparison to an Eau De Parfum which typically contains 15-30% and can last up to 8-10 hours
The less concentrated eau de cologne produces a fresh effect and has a light scent that dissipates after one to two hours, whereas the eau de toilette lasts for three to four hours. By contrast, eau de parfum and perfume extracts have a higher concentration of odorous materials.
The French 'toilette' refers to the ritual of preparing yourself for the day ahead, from washing to carrying out your daily beauty rituals and spritzing on your favourite scent. Eau de Toilette simply means, water of the toilette and refers to a scented water used to perfume the body and hair.