Features of the Deep Sparkle Pupa, Brown
This popular and innovative Brown Deep Sparkle Pupa pattern was developed by the late Gary LaFontaine.
Hours of underwater reasearch with scuba or snorkel equipment revealed that caddis can form a gas bubble around themselves when prepering to hatch.
The antron or Z-lon case around this fly forms a transluscent impression of that bubble that trout find hard to resist.
Fly fishermen everywhere have made this fly one of the staples in their selections.