what is the material they use for sleeping bags?

Question

you know, the stuff that gets real cold and its nice and slippery, does anyone know exactly what that material would be considered?

Answer 1

INSULATION TYPES:

Triloft® II: 100% polyester, solid-core fiber providing excellent loft and retention. Provides ample heat insulation for cool outdoor evenings, and dries quickly after becoming wet. Odorless, non-allergenic, mildew and moth resistant. Washable.

DuPont Hollofil® 808: DuPont trademarked fiber. 100% polyester fiber with a single-hole chamber in the core. The hollow core allows for more trapped air creating greater loft than unbranded solid-core fibers for added comfort and warmth at equal weight. Odorless, non-allergenic, mildew and moth resistant. Washable.

DuPont Hollofil® II: DuPont trademarked fiber. 100% polyester 4-hole fiber designed to be compact, yet resilient and refluffable. The 4-hole fibers trap more air for a softer insulation that conforms to body shape for greater comfort and warmth. Hollofil® II is 20% warmer than unbranded solid-core at equal weight, and retains its warmth when damp. Odorless, non-allergenic, mildew and moth resistant. Washable.

DuPont Quallofil®: DuPont trademarked fiber. 100% polyester 7-hole fiber designed to provide the optimum balance of compatibility, warmth, and durability. The 7-hole fibers result in a softer insulation that drapes to your body shape for excellent warmth in extreme weather conditions. Sleeping bags with Quallofil® insulation have an excellent warmth to carry-weight ratio, and retain body heat even when damp. Odorless, non-allergenic, mildew and moth resistant. Washable.

Answer 2

Nylon shell and hollowfill filling

Answer 3

water inside the leather bag with motor vibrator.