Special Nylon Sev is a type of Indian snack made from chickpea flour (besan) and spices. It's extruded through a special press to form thin, noodle-like strands, then fried until crispy. It's commonly seasoned with salt, chili powder, turmeric, and other spices, giving it a savory and spicy flavor. It's popular as a crunchy topping for chaat or enjoyed as a standalone snack.