Sac (m)
(with) definite article: leair reservoir: flexible (usually of animal skin), ready for the insertion of stocks
According to Fernand Delzangles, »Danses et chansons de danses d’Auvergne« (Aurillac, 1930), "due to their non-porosity, dog- and fox-skin could be transformed into bagpipes";
NB: ➺ my remarks to Renard (drone of the Cabrette).
Leydi, Roberto: La zampogna in Europa. Como, 1979, p.64.
Ricros, André (et al.): La cabrette: histoire & technique d'une cornemuse. s.l. [Riom], 2017, p.[19], 74 (»Delzangles [renard; 2x]), 84 (»Delzangles), 545, 588, 731, 781, 795.