Shhh ? make sure the kids aren't looking. TripleFish's new X-Rated copolymer line features some surprising qualities. Five times more abrasion-resistant than monofilament, this line also boasts awesome castability and suppleness. Made from several plastic polymers, X-Rated lines are 20 percent smaller than monofilament. Although they're not braids, these copolymer lines are strong enough to cut fingers if pulled too tightly. X-Rated comes in strengths of 4- to 15-pound test and is available in 440-yard filler spools and bulk spools of 2,000 to 6,000 yards. Prices range from $7 to $8 for the filler spools and $15 to $17 for the bulk quantities.