Lots of Indicator Yarn - 3 feet of custom dyed and spun yarn per spool Innovative Design - Spools are light weight and the perfect shape and size for using on the river Designed for Fly Anglers - Fits perfectly into vest, pocket or pack - won't crush or deform Convenient - Easy to carry - easy to use Yarn is Custom Spun - Fits Perfectly - One strand for "regular tubing" - three strands for "x-large tubing" Great Value - Wool and tubing are reusable Pure, Natural and Bio-Degradable - Our yarn is made from 100% pure New Zealand wool Wool indicator casts like a dry fly and lands gently. Use the optimal color indicator for the conditions. Radioactive Orange - when sighting is a challenge Neon Lemon - Sunglasses required! Fluorescent Green - best when the background is dark or in low light conditions Stealthy White - looks like an air bubble Jet Black - best when there is glare, and the water surface turns silver/gray