Source : Webster's Revised Unabridged Dictionary (1913)

Fluffy \Fluff"y\, a. [Compar. {Fluffier}; superl. {Fluffiest}.]
   Pertaining to, or resembling, fluff or nap; soft and downy.
   ``The carpets were fluffy.'' --Thackeray.

         The present Barnacle . . . had a youthful aspect, and
         the fluffiest little whisker, perhaps, that ever was
         seen.                                    --Dickens.
   -- {Fluff"i*ness}, n.

Source : WordNet®

fluffiness
     n : a light softness [syn: {downiness}, {featheriness}]