Mountain Hardwear Hyperlamina Spark Synthetic Sleeping Bag

0°C Comfort Limit (EN13537:2012), 567g of Thermal Q Synthetic Insulation
Weighs 848g (Regular bag)
Code: SS15678V
  • Now From £164.99
  • (FREE UK & EU Delivery)
Item out of Stock | Usually dispatched within 24 hours

Mountain Hardwear's Hyperlamina series of synthetic bags combine the excellent Thermal Q insulation with ultralightweight fabrics and zoned filling to provide performance at low weight.

Mountain Hardwear says: 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.

The Hyperlamina Spark is a lightweight, synthetic sleeping bag ideal for trips where temperatures could reach 0°C . The bag boasts a better warmth to weight ratio than traditional synthetic fill bags thanks to the Lamina construction which welds the Thermal.Q insulation to the shell and lining, eliminating the cold spots caused by traditional stitching. Zoned insulation places additional insulation at your core and feet to get more warmth where you need it, without any unnecessary weight.

The center, half-length zipper saves weight, while maintaining the ability to vent the bag if you start to get too warm. The snug-fitting performance mummy cut is designed to maximize warmth while eliminating needless bulk and weight. When the night starts to get cold, fasten the face gasket and cinch down the tailored hood to block out the drafts and seal in the warmth.

- Reviewed by Ultralight Outdoor Gear

Read reviews here: 
Help and advice:Choosing a sleeping bag adviceEN 13537 rating for sleeping bags explainedSynthetic Insulation explained at Ultralight Outdoor Gear
Sleeping bag shape and sizes adviceSleeping Bag features Page 1Sleepin bag features page 2
  • 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.
  • 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


  • Insulation: Thermal.Q
  • Bag Shell: 22D Dobby


  • Fit: Regular-Sleep Bags
  • Weight: 848g
  • Bag Shape: Performance Mummy Cut
  • Bag Loft: 3 in / 8 cm
  • Bag Stuff Size: 6 in x 13 in / 15 cm x 33 cm
  • EN Rating: T-LIMIT: 32 F / 0 C ( EN13537:2012)
  • EN Rating: T-COMFORT: 41 F / 5 C ( EN13537:2012)
  • Bag Fill Weight: 1 lb 4 oz / 567g
  • Inside Length Regular: 78 in / 198 cm


  • Weight: 904g
  • Bag Shape: Performance Mummy Cut
  • Bag Loft: 3 in / 8 cm
  • Bag Stuff Size: 6 in x 13 in / 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 / 567g
  • Inside Length Long: 84 in / 213 cm

EN13537:2012 - Look for the 2012 label for the most accurate rating; In 2012 the EN system of testing sleeping bags was re-vamped - the new testing procedures are more rigorous, producing more consistent results than previous tests. 2012 results tend to rate sleeping bags as poorer performing by a few degrees when compared to previous test results, even though the sleeping bag may be identical, or even better.

This means that comparison between an EN13537:2012 rated bag and an EN13537:2002 rated bag are particularly difficult - our advice is to use the new EN13537:2012 rating to compare with other bags who have also been rated in this way.

Showing our 2 Mountain Hardwear Hyperlamina Spark Synthetic Sleeping Bag reviews with an average rating of Excellent. Would you like to write a review?
Review Summary - 5 out of 5 based on 2 ratings.
August 21, 2017 | Laurence
Step aside down bags: you've been replaced

Fantastic sleeping bag. I used it in a bivvy bag in the wind and rain of the Peak District. It was around 10 degrees and I was comfortably warm with the bag unzipped and no extra layers (I did use a cotton liner to keep the bag nice and clean but it wasn't needed for warmth). The sleeping bag, liner, and bivvy bag all fitted into my handlebar dry-bag without issue; this bag packs incredibly well and, unlike down bags, should it get wet (it happens) it won't loose its thermal properties.

July 20, 2017 | Ross
Fantastic bag - no need for down

The size and weight is unparalleled for synthetic so you really get all the benefits of synthetics without the weight penalty. It feels satisfyingly lofty and is very comfortable to sleep in. I found the bag overall to feel very high quality and very warm down to around 5C. At 0C it was just about okay for me to sleep with a liner and a fleece so I would look at the -7C perhaps for a true 3-season bag. I really applaud Mountain Hardware for developing high-tech synthetics which are cruelty-free and would love to see this technology featured more in insulated jackets.