UV2 Goose Biots are short, tapered quill fibers used for tails and antennae on many popular nymph, hellgrammites, stones, ect. The "Packs" include biots of multiple colors to tie a variety of patterns.

Spirit River continues to lead the way in UV2 technology. They use a double dye process to give all their unique UV2 materials the added UVF/UVR ultraviolet wave lengths.

UVF is the fluorescent wavelength. Fish can see this spectrum in brighter colors than we see. This allows fish to see flies at a much greater distance, even in varying light and water conditions.

UVR or Ultra Violet Reflectance, is a UV light that cannot be readily seen with the human eye in some wavelengths, but it can be seen by most insects and animals.

Black	Brown	Combo Pack
Dun Gray	Golden Stone	Pale Yellow
Prince Pack	Rainbow Pack	Tan
White

Color	Code
Black	GOOS001
Blue	GOOS296
Brown	GOOS002
Chartreuse	GOOS125
Combo Pack	GOOS104
Dun Grey	GOOS050
Fl Flame	GOOS121
Fl Hot Orange	GOOS131
Fl Salmon	GOOS102
Fl Shrimp Pink	GOOS135
Fl Yellow	GOOS132
Golden Stone	GOOS074
Hot Pink	GOOS150
Olive	GOOS030
Pale Yellow	GOOS077
Prince Pack	GOOS227
Rainbow Pack	GOOS120
Tan	GOOS018
White	GOOS027