In our quest for a flawless complexion, foundation is moving on from fingers and sponges and onto airbrushing and YSL Touche Eclat style brushes. By Terry's Light Expert is (as far as I know) only the second foundation (after YSL's own) to use the brush format to try and create, in their words, 'a super natural texture' to your skin. As well as the brush, it aims to do this through 'hyaluronic acid filling spheres' (note to cosmetic industry: please stop making up pseudo-scientific terms) which smooth skin, plump up hollow areas and generally make you look perfect*.
*Maybe.
YSL Perfect Touch Foundation | Fusion Beauty GlowFusion Airglow