• Nautilus hood: the same construction as our 8000m jacket hood, a 3D hood that
  wraps around your head and reduces heat loss.
• SpiraFil insulation: a unique blend of 3 denier conjugated spiral hollow fibers for loft and 1 denier polyester fibers for warmth, softness and compressability
• Zipper guard: keeps the draft tube fabric from getting caught in the zipper
• Trapezoid foot box: matches the shape of your feet, wider in the toe area and narrower in the heels.

Marmot UpCycle products minimize our impact on the environment by using natural, organic, and recycled or discarded materials that would otherwise end up in landfills.  In the Eco Pro sleeping bag line, they use both an UpCycle fabric as well as insulation. The fabric is made from recycled plastic soda bottles...hence the name 'UpCycle.. When you recycle a plastic bottle, you get another plastic bottle; when Marmot UpCycles a plastic bottle, we get fabric, a greater value and a broader use. The Eco Pro insulation contains 80% post consumer waste, and is a hollow core continuous filament.