Vari-Fill Down Sleeping Bag

Variable filling to minimise weight: lighter in the torso to allow combining with a lightweight down jacket. Perfect for planned Alpine bivis & high camps.
Typical Operating Temperature
Guideline minimum temperature. Sleeping Bag TOT: you should get a night’s sleep, under normal circumstances. Clothing TOT: you should feel warm enough, assuming low/moderate activity. Sleep System TOT: relates to full system. For more details, see our Technical Briefing.
0°C / 32°F
For clothing, weight is for size: M. For sleeping bags, weight changes with selected length/width. N.B. there may be some variation in the weights of finished products.
540g / 19oz
Vari-Fill down sleeping bag
Real PHD-quality, nothing more to say: the best!
Tinu Schneider


  • Offer price £367. Full retail price £477. Saving of £110
  • Rare 950 fillpower European goose down.
  • Water-resistant Ultrashell outer fabric.
  • Superlight 10X inner fabric.
  • Boxwall construction for the lower half.
  • Stitch-through construction for the upper half.
  • Flared upper half to allow a down jacket to fully loft.
  • Hood draws up close around the head.
  • Footpiece: Ovoid shape.
  • Stuff sac and storage bag supplied.
  • Packed size 13 x 21cm*
  • Options:
    • short and long lengths.
    • wide and slim widths.

* Please note: we make our stuff sacs big enough to allow fairly easy stuffing rather than reducing the gear to the tightest minimum.


The request for us to develop the Vari-Fill sleeping bag was made by Swiss mountaineer Tinu Schneider as part of a previous Summer Lightning Collection competition. Tinu suggested:

“A sleeping bag with a warmer lower half over the legs and a lighter upper for the body (to be combined with a light down jacket) -- for alpine bivies.”

Part of the Midsummer Nights Collection. For June and July only, and at a never-to-be-repeated price.

The Vari-Fill bag is a great sleeping bag design to be used with a light- or mid-weight down jacket such as the Minimus Jacket, Alpine Ultra Jacket, or Yukon JacketFor cold mountain bivies and high level camping you'll have your lightweight down jacket anyway, so why not save weight and use it as part of your Sleeping System?

The lower half of the bag contains more down and uses a box wall construction to allow maximum loft and therefore warmth. So it can be used along with your jacket, the upper half has less down fill and a stitch-through construction: both features that reduce the weight of the bag.

The bag is also flared out from the waist up to allow full lofting of a down jacket worn inside.

The down-filled hood, water-resistant outer fabric and exceptional quality 950 fillpower pure goose down complete an impressively light and small-to-pack sleeping bag for the mountains.

Ultrashell (weight: 40 gsm)

One of the lightest of PHD's coated materials. This ripstop nylon provides complete wind block and good water resistance at minimal weight. Ultrashell gives an excellent upgrade to performance with very little weight penalty.

Ultralight 10X fabric (weight: 26 gsm)

10X, PHD's first 10 Denier Fabric. 9,000 metres of the yarn used to weave 10X weighs just 10g, that's about the same as a £1 coin! For all its thinness 10X is amazingly downproof and with reasonable care will go on giving you good service for years.

Sleeping bag zips

  • No zip: The standard design on our lightest bags with open hoods. The simplest/lightest system which is a must for adventure racers. Up to 140gm (5oz) lighter than a full zip with draft tube.
  • Full zips: Full zip bags ventilate well, so they can be used over a wider range of temperatures.
  • Short zips: Short zips are lighter and pack smaller than full zips. A short zip & draft tube is up to 85gm (3oz) lighter than the full version.
  • Our full briefing on sleeping bag zips.

950 fillpower down

A newcomer to our range. European goose of rare quality. A high value alternative at the top levels of performance. More on our down insulation.

This sleeping bag is the best I ever saw! It saves so much weight not only from the sleeping bag but from the total weight of my pack and is still warm enough to really sleep and get up fresh

As the Vari-bag has a real hood, I can bring a light down-jacket without hood instead of a bigger jacket with hood.

When it comes to choosing the right sleeping bag, my friends always laugh at me when they see the flimsy pieces I bring (but then I laugh at them because of their large and heavy packs...).

What I really like:

  • construction excellent! The change from 'boxed' to 'stitch through' is at the right place.
  • hood: it has a hood! I think this is the other main advantage of this sleeping bag. A hood makes it so much warmer.
  • elastic cord on the hood - fits perfect when closed
  • material, built quality: real PHD-quality, nothing more to say: the best!

Tinu Schneider after two overnight field tests in the Swiss Alps at 3-4000m.


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