 His high degree of Thoroughbred blood brought an elegance to his progeny, and this trend toward a lighter dressage horse has been on the rise since he stood at stud.He consistently produced offspring with good shoulders and toplines, as well as elastic and rhythmic gaits.Bolero was the founding sire of a new B-Line in the 1990s, and produced the stallion Brentano II, who also became a foundation stallion for this line.