This is a brand new size small Velocio jersey with their super soft material, one of the nicest in the industry (I also wear Assos, Rapha, Pas Normal, MAAP, etc). This doesn't have that paper texture that some of the new aero fabrics have, it's silky smooth like the Assos Mille GTO.
I lived next to Enve headquarters and bought these full price when they came out in 2019. Letting it go as I wear my other two frequently and have too much kit
AFAIK, this is the only unopened size small for sale in the Western hemisphere (and possibly world).