Blue and transparent posterior matrices with an integrated fixation device. The new and exclusive blue color, presented as an alternative to the transparent matrix, was chosen to provide greater contrast with the dental structure, and its effects on the degree of composite conversion are negligible. This offers a significant advantage for better visual control during composite application, filling procedures, and handling. The colored matrix does not discolor upon contact with etching gels, fixatives, and primers. The blue line represents a step forward that simplifies and accelerates the daily work of dentists. The traditional matrix holder is no longer necessary. The matrices can be adjusted to individual requirements using gingival or occlusal retention. Matrix thickness of 0.075 mm.