What is the most unbreakable e violin string and where to buy?

The most unbreakable e violin string is often considered to be the E string made of steel, particularly those from brands like Pirastro, Thomastik-Infeld, or D'Addario. These steel strings are known for their durability and resistance to breaking compared to synthetic or gut strings. You can purchase them at local music stores, online retailers such as Amazon, or specialized string shops like Shar Music or Johnson String Instrument.