Each iris and eyebrow is often applied by hand.
Some V12 works include internal tech to keep the silicone at body temperature. touching+a+sleeping+married+woman+yayoi+v12+work
The V12 series often features "EVO-skin" or dual-layer silicone, where the surface is soft but the "muscle" underneath is firmer, providing a realistic tactile response when touched. Collectibility and Market Value Each iris and eyebrow is often applied by hand