This is an Optional Breath Deflector produced by Arai to control Shield/Visor Fogging by keeping your breath (nose or mouth) from reaching the Shield/Visor. This is NOT the Stock Rubber Breath Deflector that comes on Arai Helmets. This part has many names including Racing Breath Deflector and Cloth Breath Mask. Specifically Designed by Arai to fit ALL SAI and SAL Full Face Arai Helmets. SAI Type Arai Helmets RX7-GP, Corsair-V, Chaser-V, Vector-2, Quantum-V, Quantum-J, Quantum ST, Signet-Q, Defiant, Rebel Axces, Axces II. SAL Type Arai Helmets RX7-Corsair, RX7-RR4, Quantum/f, Quantum/e, Quantum-2, Chaser, Vector, Signet-GT, Viper-GT NR (All versions), Condor, Astro-R, Astro-J, Astral, Astral-X. Also Fits The New RX7-V , QV-Pro, Chaser-X, Axces III.