• Durable SpiraFil™ insulation provides an exceptional combination of warmth, softness, low weight and packability
• Wave construction on top of bag provides maximum loft and warmth; blanket construction on the bottom offers exceptional warmth and comfort
• 3D hood construction envelops your head in warmth; the 2 drawcords that tighten hood are easy to differentiate in the dark
• 3D footbox increases the insulation and room for your feet
• External stash pocket keeps nighttime necessities close at hand
• Fold-down second zipper provides added ventilation options and easy bag access