Waterproof fabric refers to the fabric that has undergone technical treatment on the basis of BEGOODTEX's permanent flame retardant fabric to form a stable air interface protective film on the fabric surface, which can achieve the functions of waterproof, oil-proof, and stain-proof. This treated fabric is called "three-proof" fabric.

The waterproof function is achieved by coating a layer of waterproof film on the surface of the fabric. This film can prevent water penetration while not closing the fabric's pores, allowing the fabric to be both waterproof and breathable.