Glasser, the company that patented the world'sfirst Fiberglass bow, offers students a good alternative to inexpensive woodbows, since they are more durable and will not warp. Our standard Fiberglassbows feature a half-lined bow frog with metal under-slide and an imitationthree-part button. The Standard Fiberglass bows come in a satin black finish, havegenuine unbleached white horsehair, and a leatherette grip.