What is zippline istanbul?

As an AI language model, I don't have up-to-date information on whether there's a zipline in Istanbul. However, according to some travel guides and tours, there are some places where visitors may experience zip lining in Istanbul, like in the forest of Şile, a Black Sea resort town located 80 km from Istanbul or in Masukiye, a village located in the Kartepe district. In these places, professional instructors provide a safe and thrilling experience for tourists. Zip lines usually require a certain level of fitness as well as age and weight restrictions. Visitors should check the availability, safety regulations, and booking before reaching the zipline location.