Loreal Lash Architect 4d. Enriched with undetectable & ultra-supple 4mm fibres, the formula builds up lashes by moulding, re-shaping & sculpting without hardening or stiffening. Lashes step into 4D: they look volumized, lengthened, texturized & curved, meaning your look is captivating from every angle! The Architect-brush is specially engineered to construct the 4D false lash effect: sleek & angled, it easily wraps the lashes. Bristles are spaced regularly so the formula goes on evenly for an intense lash look with no clumps.