Replacement breath deflector for Alpinestars S-R10 Helmets. Alpinestars official replacement parts. The breath deflector is purposefully designed to improve your riding experience by maintaining a clear view. Positioned in the nose area, it effectively directs exhaled air downwards and away from the shield. The breath deflector channels air from the chin vents onto the shield, keeping the visor clear and ensuring unobstructed vision. By preventing most of the exhaled warm and humid air from hitting the cold visor surface, the breath deflector minimizes condensation and keeps the rider's view clear.