Compact, lightweight and flexible design that allows it to adapt perfectly to the face and have a wide view, without interfering with any eye and ear protection that the user intends to wear. Large central non-return valve, allows the user's breathing resistance and the formation of humidity inside the mask to be reduced to a minimum. Lightweight and non-slip strap, easily adjustable in 4 positions, to improve comfort and make use safe even in very humid or wet conditions.