What is banyan undershirt?

As an AI language model, I don't have personal experiences or opinions, but here is some factual information about banyan undershirts:

Banyan undershirts are a traditional sleeveless garment worn by men in India, Bangladesh, and Sri Lanka. They are made of cotton or silk and are loose-fitting, reaching down to the knees. Banyan undershirts are commonly worn as an inner garment to absorb sweat and prevent body odor. They are also used as sleepwear and are considered comfortable and breathable in hot and humid climates. In modern times, banyan undershirts have been adapted for fashion with various colors and patterns available.