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Item #: 331767554

The Mountain Hardwear Hyperlamina is one of the highest performance synthetic bag on the market from Mountain Hardwear. Featuring thermally mapped insulation and half-length center zip maximize efficiency and warmth for three-season usage. 


  • Engineered to be lightest and warmest synthetic bag available
  • Proprietary welded Lamina™ construction enhances loft and eliminates cold spots
  • Zoned insulation maximizes warmth where it's needed most
  • Thermal.Q® insulation has outstanding compressibility and maintains excellent loft
  • Single #5 half length center zip with dual sliders minimizes weight and still allows for ventilation
  • Performance mummy cut is snug, reducing girth, weight, and bulk and maximizing thermal efficiency
  • Ergonomic draft collar blocks the escape of heated air from inside the bag.
  • Comfort footbox follows natural foot position for maximum warmth and comfort
  • Ultralight shell is soft and highly wind resistant
  • Face gasket and tailored hood comfortably block drafts at the hood opening and seal in warmth
  • Sil-Nylon compression stuff sack and mesh storage sack included


  • Weight: 2 lbs 7 oz (1.11 kg)
  • Temperature: 21° F / -6° C
  • EN Rating – Comfort: 32°F / 0°C
  • EN Rating – Lower Limit: 21°F / -6°C
  • Fill Weight: 1 lb 13 oz (822 g)
  • Inside Length: 78" (198 cm)
  • Shoulder Girth: 63" (160 cm)
  • Hip Girth: 58" (147 cm)
  • Foot Girth: 39" (99 cm)
  • Stuff Sack: 7" D x 16" H (18 x 41 cm)