Great for fishing in those tough-to-crack gin-clear waters, Hi-Seas Grand Slam Fluorocarbon Coated Fishing Line provides the visibility advantage you need. This extra strong, 100% copolymer line has a fluorocarbon coating to help it virtually disappear underwater. Easy to manage, Grand Slam Fluoro Coated is a supple, very castable line with high knot strength and abrasion resistance, which allows it to excel both as a mainline and as leader material.