Large and powerful, Neapolitan Mastiffs are known for their massiveness – massive head, massive bone, and massive body. Despite their fierce appearance and serious demeanor, Mastini are generally peaceful, steady dogs. The breed’s trademark is the loose skin that covers their bodies, the abundant wrinkles and folds on the head and their rolling and lumbering gait. Their short coat can by gray (blue), black, mahogany and tawny. Some brindling and white markings are allowed.