M.Degree 250 K Down Sleeping Bag

Superlight 0°C bag. Featuring our lightest fabrics & highest lofting down with hybrid construction for minimum pack weight & maximum warmth. Optional waterproof foot cover.
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.
390g / 14oz
Minimus Degree 250 with optional waterproof foot cover

"Extraordinarily light for the warmth, and very comfy. I took it to the Colorado Rockies ... and it was excellent"

Chris Townsend



  • PHD 'K Series': Ultimate warmth / weight performance.
  • Unique 1000 fillpower Goose Down
  • Sheer-light 7X fabric throughout
  • Box-wall construction on the top for maximum loft
  • Stitch through construction on the base for minimum weight
  • Pack size†: 13 x 21cm
  • Oval footpiece: fits naturally to feet and avoids pressure
  • Adjustable hood draws up close around head
  • Stuff sac & mesh storage bag supplied
  • Options:
    • Colour: Red or Black
    • 4 different widths for the perfect fit: Slim, Std, Wide and Extra Wide*
    • 4 different lengths for the perfect fit: Short, Std, Long, and Extra Long*
    • Hypershell water-resistant outer (Red & Black or all Black)
    • Waterproof Dri-LX outer fabric shell (+220g)‡
    • Zip options:
      • Full zip (left or right)
      • Short zip (left or right)
    • Foot zip (left or right)
    • Waterproof footbag cover
      • Stud on
      • Sewn on

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

‡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.


Winner of The Great Outdoors (TGO) Gold Award in the Camping Category of TGO's Gear of the Year Awards.

Warmth while you sleep is essential; carrying extra weight isn’t.

Created for self-supported ultra-runners, mountain marathon racers, lightweight backpackers – anybody who demands every ounce of performance from the kit they carry – the M.Degree° bags form the lightest series in our range.

Using “7X” (one of our lightest fabrics) and 1000 fillpower goose down (our unique, exceptionally high grade insulation) allows us to create a superbly lightweight bag, but it’s the specialist dual-construction design which takes it to the next level.

The top of the bag uses box-wall construction to allow optimum down lofting, and stitch-through construction on the base sheds excess bulk, working with your ground insulation mat to deliver the ultimate weight saving performance

As with all PHD sleeping bags, the M.Degree° series is made to order, so we can offer plenty of options. To begin with, a combination of 4 different lengths and 4 different widths allow you to get the perfect fit. Primarily this is because poor sizing compromises insulation, but it also means that you carry only what’s necessary.

The outer fabric can be upgraded to water-resistant Hypershell (condensation can be very heavy inside a tent or bivi) and, because dampness at the foot of a bag is so often the consequence of touching the inside of a tent, an optional waterproof foot cover can be specified for extra protection. This can be sewn on or – so you can detach it and strip the bag right down for super-minimalist overnights – we can make it stud-on: it’s up to you.

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.

Half- and full-length zip options allow greater flexibility in varying temperatures, while the foot-zip option is the ultra-light way to cool warm feet. Of course, to maintain minimum weight and pack size we’ve selected super-light zips.



Ultralight 7X fabric (weight: 22 gsm)

7X is our new sheer-light 7 denier fabric. An exquisitely fine rip-stop nylon, 7X is incredibly light, highly wind-resistant and has first-rate down proofing. This fabric helps us create the very lightest of gear in the PHD range. Of course the lighter the fabric the lighter the sleeping bag or down clothing, and the less space it takes up in your rucksack. This fabric is so light it actually helps to allow even greater lofting of the down too.

Water-resistant HyperShell fabric (weight: 28 gsm)

HyperShell is PHD’s exceptionally lightweight waterproof coated fabric. This remarkable ripstop nylon provides complete windblock and good water resistance at a breath-taking weight (28 gsm). HyperShell protects the down from condensation drips found typically in tents, tarps and snow-holes, but its very low weight allows greater lofting of the down and a smaller pack size. Hydrostatic head: 1000mm.

Note: unlike some other so-called 'proofed' fabrics, HyperShell does not rely solely on a DWR (durable water repellent) coating. Although it has a DWR coating, more importantly it has a breathable and permanent PU coating applied on the underside of the fabric that cannot be abraded through daily use, so performance is maintained over many years.

Foot zip

For the lightest and smallest pack a sleeping bag without any zips is king, but for those with warm feet, or even race blisters, a foot zip can be more than just a little luxury. Adding only 10-12g to the total weight of the bag, the foot zip is the ultralight route to comfort.

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.

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.

1000 fillpower down

This rarest of all downs we reserve for the K Series. European goose down of unique quality. 1000 provides the highest warmth-for-weight performance possible from down. More on our down insulation.


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

On the bottom stitch-through seams are used to minimise weight. More on sleeping bag construction.

"Extraordinarily light for the warmth, and very comfy. I took it to the Colorado Rockies ... and it was excellent"

Chris Townsend

Works well with
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