My Friend has the Ruroc Atlas 3.0 & 4.0 Helmet, and said the noise that comes through the ear vents can be very uncomfortable. So I made these rubber inserts. That has almost completely gotten rid of the noise. They are 3D printed part, that can be fitted and removed very easily. Or if requested I can supply a double sided tape to keep them in place. you will receive 2 piece's 1 x Left Plus 1 x Right.  Helmet Not Included.