Animal rights activists might have got trembled after seeing Ötzi, the Iceman's hard-core leather outfit.

The extraordinarily preserved body of the 5,300-year-old iceman mummy was discovered frozen in the Austria’s Tyrolean Alps. Latest genetic proof suggested that the mummy once used to wear an outfit almost entirely composed of animal skin. Scientists have also succeeded in finding the animals used to make the Stone Age getup.

The study co-author Niall O'Sullivan, researcher at the Institute for Mummies and the Iceman, EURAC research in Bolzano, Italy, said that they have found the clothes of the iceman were made up of numerous distinct animals. The latest findings have shed a lot more light on Earth’s best-studied mummies.

In 1991, hikers discovered the Ötzi the Iceman initially in the Ötztal Alps, near the border with Austria and Italy. Since then, researchers have been minutely scrutinizing the surprisingly well preserved body to the every smallest detail, ranging from his attire, to the work he used to do, to the last meal he ate, to his probable death cause and poor oral hygiene. In 2013, a genetic analysis also discovered some of the living relatives of the iceman.

Back in 2008, during the course of a study, researchers noted that some of the hair from Ötzi's animal-skin attire belonged to domesticated animals. But, despite of extensive analysis of every tiny detail for so many decades, so far, researchers don’t have an idea about the main animals that contributed their skin for the Ötzi's fashion sense.

To determine the same, O'Sullivan along with his colleagues tried to collect genetic data from the outfit of Ötzi. In the study, appeared on August 18 in the journal Scientific Reports, the researchers mentioned that it may be a tricky task because there are huge chances that the leather probably underwent treatment, including intense heating, scraping, and exposure to fatty acids.