UNI-Floss is a single strand floss, 600 denier, strong and shiny. Salmon fly dressers (as well as other fly-tiers) will appreciate the wide range of 30 pattern matching colours : Beige, Black, Burnt Orange, Brown, Bright Yellow, Charcoal, Cream, Doctor Blue, Emerald Green, Golden Brown, Green Highlander, Gray, Dark Blue, Dark Brown, Dark Green, Dark Rust, Light Blue, Light Green, Olive, Orange, Pink, Pumpkin Orange (the Grey Ghost body), Purple, Royal Blue, Red, Rusty Orange, Rust, Tan, White and Wine. A convenient way to purchase UNI-Floss is in the prepackaged combinations of 20 colours. Available in spool of 15 yds and 80 yds.