Braided Spectra is very strong line recommended for alligator gar and other large game bowfishing. It is less likely to cut on tough scales or underwater debris and is salt water resistant. Available in 350, 400 or 640 pound strengths on small or large spools. Small spool fills a regular bottle, large spool fills 2 regular bottles or one long bottle. AMS recommends keeping your bottle full. (Sorry, only available in white). Made in America!