Mountain Hardwear Lamina Z Spark 34 F/1 C Sleeping Bag

  • Product Number: 3041

Unique Lamina™ construction maximizes the loft of your insulation, eliminates cold spots and thermally maps insulation to areas you need the most warmth. By strategically placing insulation, we are able to concentrate warmth where you need it most – around your core and feet. The comfort mummy fit of this 34°F/1°C -rated bag offers room to move while remaining thermally efficient. It also features our exclusive welded Lamina™ construction that maximizes loft and eliminates cold spots caused by traditional stitching. Soft polyester lining wicks away moisture and lightweight nylon shell repels water. Full-length zipper has double sliders for ventilation.


  • Proprietary, welded Lamina™ construction enhances loft and eliminates cold spots
  • Zoned insulation maximizes warmth where it's needed most
  • ThermalQ® insulation has outstanding compressibility and maintains excellent loft
  • Comfort mummy cut efficiently maximizes weight without constriction
  • Full length #5 zipper with double sliders for versatile 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
  • Durable, lightweight nylon shell with DWR treatment repels water
  • Soft polyester lining wicks away moisture
  • Zippered pocket at shoulder for storageNylon compression stuff sack and mesh storage bag included


Weight: 2 lb 1.9 oz / 960 g
Bag Shape: Comfort Mummy Cut
Bag Loft: 3 in / 8 cm
EN Rating: T-COMFORT: 42 F / 6 C
EN Rating: T-LIMIT: 34 F / 1 C
EN Rating: T-EXTREME: 6 F / -14 C
Bag Stuffed Size: 6 in / 15 cm x 12 in / 30 cm
Inside Length Regular: 78 in / 198 cm
Inside Length Long: 84 in / 213 cm
Hip Girth Regular: 59 in / 150 cm
Hip Girth Long: 64 in / 163 cm
Shoulder Girth Regular: 63 in / 160 cm
Shoulder Girth Long: 65 in / 165 cm
Foot Girth Regular: 41 in / 104 cm
Foot Girth Long: 43 in / 109 cm
Fabric Body: 30D Nylon Ripstop
Insulation: Thermal.Q™ 60 g/m²
Bag Fill Type: SYNTHETIC

Ideal For:

Summer, Camping, Backpacking