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HyperLamina™ Spark 35 Sleeping Bag

Mountain Hardwear

HyperLamina™ Spark 35 Sleeping Bag

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HyperLamina™ Spark 35 Sleeping Bag is available for purchase in increments of 1

Highest performance synthetic bag on the market. Thermally mapped insulation and half-length center zip maximize efficiency. Engineered to be the lightest and warmest synthetic bag on the market. Lamina™ construction welds the Thermal.Q® insulation to the shell and lining, eliminating the cold spots caused by traditional stitching. By mapping different insulation weights throughout the top of the bag we are able to concentrate warmth where you need it most – around your core and feet. Thermal efficiency is optimized by a performance mummy-cut, face gasket and single center half zip.


  • 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
  • Comfort footbox follows natural foot position for maximum warmth and comfort
  • Face gasket and tailored hood comfortably block drafts at the hood opening and seal in warmth
  • Performance mummy cut is snug, reducing girth, weight, and bulk and maximizing thermal effiency
  • Ultralight shell is soft and highly wind resistant
  • Sil-nylon compression stuff sack and mesh storage sack included



Insulation:   Thermal Q 60 gram Thermic Micro

Bag Shell:   22D Dobby

Bag Fill Type:   SYNTHETIC

Apparel Fit:   Regular-Sleep Bags

Weight:   1 lb 13 oz (813 grams)

Bag Shape:   Performance Mummy Cut

Bag Loft:   3" (8 cm)

Bag Stuff Size:   6" x 13" (15 cm x 33 cm)

EN Rating (T-LIMIT):   32° F (0° C)

EN Rating (T-COMFORT):   41° F (5° C)

Bag Fill Weight:   1 lb 4 oz (567 grams)

Inside Length Long:   84" (213 cm)

Hip Girth Long:   64" (163 cm)

Foot Girth Long:   41" (104 cm)

Shoulder Girth Long:   66" (168 cm)