Tag Archives: Pertex Quantum

Shelter for the walk

In future months I will be sleeping out on a few nights when I head off from New Norfolk towards Lake St Clair trudging beside the Derwent River. In the past few days I have outlaid outlandish sums of money when I purchased the lightest sleeping bag and tent.  Collectively they weigh 1.99kg.  We all have our priorities and mine is clearly to walk to Lake St Clair with the minimum of discomfort.  For others who might follow in my footsteps and expect to seek the lightest gear, as an example here is what I bought.

  1. The tent, a Marmot Force 1P, has a bright lime green shell supported by slim ‘Featherlite’ steel rods. In this one person tent I will be able to sit up (head zone is 91cm high), load the contents of my backpack at my feet (length less than 2 metres), and sit my backpack outside in the triangular vestibule.  It has a full coverage fly. The documentation with the tent indicates the package weighs 1.06kg.

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Yes this is the tent set up in the comfort of my loungeroom!  It was a trial installation; first the tent and then the fly.

  1. The sleeping bag is a Mountain Design Ultra Tek 470 with a black 20 Denier shell, a vivacious orange coloured zip defining one edge and the inside of the bag is aflame with more brilliant orange fabric. Pertex Quantum is the windproof fabric used to reduce the weight without sacrificing strength and abrasion resistance. IApparently the fabric’s softness allows insulation in the sleeping bag to have more loft. A special feature is the water repellence of the 750 Duck Down Tek fill. The sleeping bag, including the stuff sack, weighs a mere 0.93kg.

Sleeping bags are temperature rated in 3 different measurements:

  • Comfort (C) is based on a standard adult woman having a comfortable night’s sleep
  • Limit (L) is based on the lowest temperature at which a standard adult male is deemed to be able to have a comfortable night’s sleep
  • Extreme (E) is a survival only rating for a standard adult woman

The temperature rating guide for my sleeping bag is C=1, L = -4, and E = -21 degrees.

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I still need to obtain one further comfort item; an inflatable mattress which weighs next to nothing.  More research required.