Airoh Matryx is the quieter pick overall. It shows up in a 2026 quiet-helmet roundup with an average of 97 dB, which is a strong result, while the Nexx X.WST3 review I found focuses more on touring performance and does not give the same quietness ranking.

Quick read

  • Quieter: Airoh Matryx.
  • Better-known for touring focus: Nexx X.WST3.
  • Practical takeaway: if noise is your main priority, Matryx looks like the safer bet from the sources I found.

Why

The Airoh Matryx is described as a sport full-face helmet with advanced ventilation, a large visor with A3S anti-fog, and an aerodynamic design. A separate review also notes its composite-carbon shell and claims it is wind- tunnel designed.

For the Nexx X.WST3, the source I found says it is a high-end full-face helmet suited for touring, but it does not provide a direct noise comparison against Matryx.

Bottom line

If your only question is “which is quieter?”, the available public info points to Airoh Matryx.