TOURNA SYNTHETIC GUT ARMOR. Synthetic Gut Armor is designed for maximum playability and durability at a reasonable price. Multifillament fibers are wrapped around a high tenacity center core. Durable polyester wraps reinforce the core and internal resin allows for greater elasticity to give a player a Gut-like feel. Great for hybriding with co-poly strings. – 16g & 17g, 40’ sets and 660’ reels. Black color.