Matrices that allow for a modern approach to composite dentistry but are stiffer and easier to place than traditional matrices. For closing large black triangles where there is still a contact between the teeth; not for closing full diastemas where there is no contact present. Predictable restoration or change of a tooths emergence profile. Shape allows for injection/placement of composite into the embrasure without fear of leaving an overhanging margin. Mylar finish leaves the interproximal composite smooth and properly contoured. Firm stabilisation and full marginal seal when seated into the sulcus, which make them easy to use wedge-free when closing small spaces with a full contact.