Pertex

Pertex Quantum® is the lightest down-proof by construction fabric available. It is a true featherweight at around 30g/m2 and uses the finest yarns available with the maximum thread count.

Less weight shouldn't mean 'please be careful'. Pertex Quantum® stands its ground. Pertex Quantum® shows the best strength to weight ratio. Tear strength and seam strength are good for its weight and it's soft as silk, with the smallest packing volume of any Pertex® material. Pertex Quantum® withstands the abuse of hardcore use.

850 Down Fill

Certified 850+ Fill Goose Down bags are constructed with the following features:

• Nautilus Hood: the same construction as our 8000m jacket hood, a 3D hood that
  wraps around your head and reduces heat loss.
• Hood Muff: creates a warm down gasket around your face, keeping the drawcord
  away from the face.
• Stretch Tricot Baffles: allow the bag to be stuffed and unstuffed without tearing the baffle material.
• Trapezoid Foot box: matches the shape of your feet, wider in the toe area and narrower in the heels.
• Down Fill Oversized Draft Tube: eliminates cold spots
• Zipper guard: keeps the draft tube fabric from getting caught in the zipper
• Ground Level Seams: top layer wraps fully around the body creating a warm layer of down.