FireLine equals Superline! The term SuperLine was introduced in 1996 - and it has remained the world's true SuperLine ever since! It is simply the strongest, most abrasion-resistant superline in its class! Not a conventional braid and not a mono - Thermally Fused FireLine changed fishing forever. THE STRONGEST, MOST ABRASION-RESISTANT SUPERLINE IN ITS CLASS. The smooth handling superline - optimized for spinning reels. Superb Sensitivity - Instant feel for structure and strikes. Thin diameter - incredible lure action and low visibility.