From 1961 to the debut of "Superstar Ken" in 1977, Ken had straight, nonbendable arms and a head that could only turn left and right. Ken's hair was made of felt in his first year (known to collectors as the "flocked" hair Ken), but this was replaced with a plastic, molded hairstyle when the felt hair was found to fall off when wet. Superstar Ken featured a dimpled smile, a head that could swivel, bent arms, a more muscular physique, jewelry, and underwear permanently molded to his body. The woman who made the Ken doll made it to resemble her husband.