Icelandic 300 Down Sleeping Bag

A lightweight, shoulder-length down sleeping bag with a roomy, comfort-focused shape. Perfect for campers and backpackers who like to stretch out or curl up.
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.
650g / 23oz
Icelandic 300 (shown in optional green Ultrashell fabric)


  • A Semi-Rectangular Sleeping Bag
  • Cut wide and roomy for wriggle room
  • Shoulder length for open head space
  • Wide footpiece
  • Exceptional 900 fillpower European Goose Down
  • Lightweight M1 outer and inner fabric
  • Box-wall construction 
  • Straight-wall baffles for lightness
  • Stuff sac and mesh storage bag
  • Pack size: 17 x 28 cm†
  • Colour: Black
  • Options:
    • Water-resistant Ultrashell – green
    • Waterproof Dri-LX outer fabric shell (+250g)‡
    • Slim, Wide and Extra Wide widths*
    • Short, Long, and Extra Long lengths*
    • Zip options
      • No zip
      • Full zip (left or right)
      • Short zip (left or right)

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

‡ Please note: The optional waterproof Dri-LX outer provides an extra seam-sealed outer shell to the bag. While a shelled sleeping bag is not designed to be used alone in heavy rain (the hood area is open to the elements) the shell does protect the bag when it is used outdoors without a tent.

* Please note: For all length and width options we change the amount of downfill to keep the warmth (TOT) the same.


If ordinary mummy shaped sleeping bags don’t quite match up to your idea of comfort, our range of semi-rectangular bags may be just what you’re looking for. Side sleepers and those who appreciate plenty of manoeuvring space will find these roomy bags less claustrophobic, allowing the independent movement a restless sleeper prefers.

Using all the advantages gained from our lightweight fabrics, and the benefits of our high-quality 900 fill power down, these semi-rectangular bags give the efficiency of a mummy sleeping bag with the ease and space of a quilt. You’ll find no cold air creeping in and no string to set up, just the enclosed warmth, width and wriggle room for a relaxed night.

Like its lighter sister bag, the Icelandic 300 is a hoodless sleeping bag of amazingly low weight and bulk. The combination of M1 fabric and rare 900 fill-power down gives it true lightweight capabilities, and our list of build options allows a choice of four different widths, four different lengths, side zip options and an outer water-resistant fabric – Ultrashell – to protect from condensation.

A night under the stars or an Autumn race recovery night with extra comfort. What you waiting for?

The optional waterproof Dri-LX outer provides an extra seam-sealed outer shell to the bag. While a shelled sleeping bag is not designed to be used alone in heavy rain (the hood area is open to the elements) the shell does protect the bag when it is used outdoors without a tent, for example in a snow-hole or under a tarp.

Dri-LX (weight: 64 gsm)

At just 64gsm, Dri-LX is our lightest 2-layer breathable waterproof rip-stop nylon fabric. Its remarkably low weight not only makes for a lighter load, but also reduces pack size. Its excellent waterproofing qualities are in part due to how it can be taped at the seams to create a waterproof shell for sleeping bags and clothing.

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.

Lightweight M1 fabric (weight: 39 gsm)

Lightweight silky microfibre. This close-weave 20 denier fabric is fully downproof, but also light and flexible enough to allow the down full loft. A reliable performer that has been the basis for much of our lightweight gear for some time.

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.

900 Fillpower Down

European goose down of very high quality. A truly excellent down with large clusters, consistent quality and lively long-term performance. More on our down insulation.


This bag has an insulating straight wall baffle system throughout (no straight-through stitching). Straight wall is the lightest of all baffle sytems. In cross section it looks like this:

More on sleeping bag construction.

Works well with
From $807.87 940g -5℃
A Semi-Rectangular Down Overbag to fit over our Icelandic or Greenlandic bags to boost...
From $472.37 130g 0℃
Our lightest insulated trousers. A combination of our lightest fabric with PHD's...
From $538.98 190g 0℃
One of the lightest insulated jackets. A combination of an exceptionally lightweight...