So here's how the story goes. A year or two ago I was attending Computex, Noctua back then told me a story about a fan series they have had in development for years. This year, however, they finally released the NF-A12x25 series fans. In total, these fans they've had in development for over four years (!). And when Noctua releases something, yes you may argue the colors, but you know is just has to be good right? By the way, many of you will be happy to learn this, there's no RGB to be found here! Yes, you can safely read onwards.

Sterrox is what it is all about while being a marketing name for a stiff hard compound based liquid crystal polymer, now used for the fans. Sterrox is based on the raw materials used in Kevlar, and thus now end up in this particular fan series, the NF-A12x25 fans. The material used will stiffen the fan blades and casing so that they can get smaller tolerances (spacing in-between the blades and frame) of the fan housing. This not only helps in airflow, but also will serve for better acoustics.