Composite beaches are natural beaches composed of a lower sandy foreshore and a backshore berm or ridge of gravels, with a distinct separation between the two sediments. Although composite beaches have long been recognised as an effective form of natural coastal protection showing a great degree of stability and adaptability in response to wave attack and sea level rise, they have received much less attention than purely sand or gravel beaches. As a results, their morphodynamics and behaviour under different forcing are poorly understood. Dynamic cobble berm revetments are a sub- category of dynamic revetments which specifically aim to create an artificial composite beach in order to protect sandy coastlines against erosion and flooding. The recent interest in this type of coastal protection triggered some experiments and studies that investigated their behaviour and morphodynamics. Due to the nature of this type of revetment, the experimental results are used here to better understand composite beaches morphodynamics.