Wave Construction offers the advantages of both traditional blanket and shingle construction with no significant increases in bag weight. Additional features of Wave constructed bags include:

• 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.

• EN Tested
• SpiraFil High Loft Insulation
• Dual Zippers
• Insulated Collar with Easy Access Cord - Engineered to Close Without Velcro, Keeps Warm Air Trapped in Your Bag
• Wave Construction - The Warmest Shingle Construction Available, Fitting Extra Insulation into These Bags by Creating an Overlapping Wave of Shingles Throughout the Bag. These Bags Will Keep You Warm and Dry in the Wettest of Environments
• Available in X-wide Fit
• Classic Trapezoidal Foot Box - For More Foot Room
• Compression Stuff Sack
• "Feely" Draw Cords - Ease Nighttime Cord Fumbling
• Hood Draw Cord - Positioned for Easy Access
• Second Side Zip
• Snagless Draft Tube - Has Heavy Oxford Cloth to Repel Biting Zipper Coils
• Stash Pocket - For Nighttime Essentials Such as a Watch or Energy Bar
• Two Hang Loops - On the Outside of Foot Box for Airing Out Your Bag
• Two Way Zipper Sliders - For Venting and Mating of Bags. Reversible Slider Tabs for Easy Use Inside or OUtside of Bag
• Velcro®-free Face Muff - Keeps the Drawcord and Zipper Away from Your Face
• Zipper Guards - Help Repel Biting Zipper Coils

• Weight:
  3 lbs 14.25 oz / 1765 g
• Fill Weight:
  35 oz / 992 g
• Size on Hip:
  58in/147.32cm
• Size on Foot:
  40in/101.6cm
• Main Material:
  100% Polyester DWR 2.2 oz/yd
• Main Material:
  100% Polyester Embossed DWR 2.2 oz/yd
• Lining Material:
  100% Polyester Tafffeta DWR 2.2 oz/yd
• Insulation Material:
  Spirafil 120