Currently (8 March 2022), both the European and US-American Etnies websites state that the "Windrow grey white gum" is vegan. So, if you search vegan, you will find this shoe. However, it's not listed in the "vegan collection" section - so, if you click on that, you will not find this shoe.
The "etnies SP22" catalogue lists this shoe as non-vegan ... or rather it doesn't list it as vegan and the catalogue lists the material as "suede, synthetic, action leather". The website lists the material as "Synthetic/Suede/Action Leather". That is, both say the same. I have just seen this kind of material info before many times for VEGAN shoes - so I just assumed the "vegan" was correct and that this colourway is synthetic ONLY.
I have asked Etnies on Facebook but haven't received a reply. Although the Etnies website does state the shoe is vegan - I think, chances are high that it is NOT VEGAN. And the "vegan" on the Etnies website may be a mistake.
So, unless Etnies confirms otherwise I would assume that the "Windrow grey white gum" is made with real animal-source suede.
From the "etnies SP22" catalog:
4101000551 WINDROW "GREY / WHITE / GUM" Force Shield reinforced upper Foam Lite 2 molded EVA footbed Hidden lace loops Slim, streamline silhouette 400NBS rubber outsole compound Vegan Synthetic/Suede/Action Leather