No one (I think) answered for real about fluff.
It's used specifically in GP atties - the Heron and the Spheroid. At least that's the only time I've seen it discussed.
It's literally some
fluff you stuff in the atty, I think...
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Fluff is chemically neutral for eliquids.
Fluff is incredibly resilient, able to be compressed and retain a cylindrical shape inside the body tube of GP® Spheroid and GPTM Heron.
Fluff has extraordinary wicking capabilities delivering consistent fluid flow for many weeks.
Fluff can be highly absorbent, and can retain 2,2 ml- 3,2 ml eliquid in the GP® Spheroid.
Fluff is very easily cleaned for reuse and dries quickly.
Cut with scissors a fluff strip with proportions of 45 mm x 20 mm and wrap it around the bell of GP® Spheroid. For GP® Heron use a 65 mm x 15 mm strip.
Its length and thickness is depending on the viscosity of the eliquid and the VG/PG ratio.