Hispar 1000 Down Sleeping Bag: K Series

Warmth to weight taken to the limit with our 'K Series' version of this expedition lightweight. Ideal for cutting loads or for moving fast in extreme environments.

Typical Operating Temperature

-46°C / -50.8°F

Weight

1315g / 46oz

Price

£1,555.00

Hispar 1000 Down Sleeping Bag: 'K Series'

Showing internal collar and double draft tubes.

Showing short side zip. Full zip is an option.

I've just returned from Vinson in Antarctica where your Hispar 1000 sleeping bag, down jacket, mitts and boots made life a breeze.
Lord Forsyth, former Secretary of State for Scotland.

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Features

PHD 'K Series': Ultimate warmth/weight performance
Unique PHD 1000 fillpower Down
Outer: Ultrashell water-resistant fabric. An excellent balance of weight, water-resistance and breathability
Inner: Superlight 10X fabric. Down-proof, wind proof and super soft
Box-wall construction for max loft
Short zip protected by double draft tubes
Pack size: 27 x 49 cm†
Straight-wall baffles for lightness
Side block baffles to prevent down shift
Extra down channels along each side ensure side insulation
Oval footpiece to fit naturally to feet and avoid pressure
Ultrashell inner panels at head to protect against breath soaking the down
Ultrashell panels at inner foot to cope with damp feet/footwear
Mummy hood draws up close around head
Collar seals in warmth at neck
Stuff sac with mesh storage bag
Options:
- Waterproof Dri-LX outer fabric shell (+250g)‡
- Slim, Wide and Extra Wide widths*
- Short, Long, and Extra Long lengths*
- Full zip (left or right)
- Further customisation available via our Design Your Own Sleeping Bag service

†Please note: We make our stuff sacs big enough to allow fairly easy stuffing rather than reducing the bags 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 or width options, we change the amount of downfill to keep the warmth (TOT) the same.

Description:

This K Series product has been created for one single reason, to take warmth-for-weight performance to the limit of what's possible. Unique 1000 down, super-light materials, and specific design features mean that the word Ultralight now applies to this wide range of gear that will take you to the Poles as well as on a Sahara Marathon. More on the K Series...

Ultralights for the mountains is what we have always called Hispar sleeping bags and even with the new K Series versions it's hard to find a better way to describe them. Perhaps 'Ultralightest' would be closer if it wasn't such an awful word.

The combination of this bag's design with the superlative quality of our 1000 down and our new fabrics, Ultrashell and 10X, almost send the Hispar K range off the scale for warmth/weight performance.

The straight-wall baffle system (as used on the Minimus) is the lightest available.
The close-fitting mummy hood borrowed from the high-performance bags brings a snug protective feel.
The Ultrashell inner panels at the head and foot help protect the down from damp.
A short zip with a double draft tube is standard on these bags (a zip is necessary with a mummy hood), and side block baffles have been inserted to prevent down shifting between top and base.
The outer V baffle at each side protects the side seams and increases the inner/outer differential to allow the down full loft.
A simple internal collar completes the technical specifications.

The weights of the Hispar K bags are graphic evidence of the effectiveness of this specific design. With the added performance of our 1000 down these bags deliver the greatest possible warmth per gram.

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.

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.

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.

Construction

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

Side V channels, and double draft tubes behind the zip optimise insulation.

More on sleeping bag construction.

Proofed inner panels

Proofed fabric (Drishell or Ultrashell) panels are included inside the hood and foot areas of the bag to help keep the down dry. In very cold temperatures your breath can cause ice to form around the face opening, which may soak into the down as it melts. The panels at the foot end are to protect the down if you get into your bag with wet socks (or in extreme situations with your boots on).

"The bag was great and had a lot of interest from the Americans while I was in Alaska as it was so much lighter, packable, and warmer than many of their bags. I’d suggest anyone using this bag for Iditarod Trail Invitational goes for a full zip option [for venting when sleeping in warmer places along the way such as checkpoints, cabins, schools etc]. I loved the lightness of the bag and how packable it was, also how quick and easy it was to get dry."
— Gavan Hennigan, using the bag to win the men’s 1000-mile footrace of the Iditarod Trail Invitational.

"The sleeping bag is absolutely incredible ... you have to see the size this down puffs up to."
— Scott Sears youngest person ever to reach the South Pole alone, unsupported and unassisted.

"Thank you for the Hispar 1000 K bag you sorted for me for the Rovaniemi 300 last month. It was great to have such an effective and lightweight bag to rely on."
— George Winkley.

Reviews relate to standard Hispar 1000, which is 205g heavier

"I've just returned from Vinson in Antarctica where your Hispar 1000 sleeping bag, down jacket, mitts and boots made life a breeze."
— Lord Forsyth, former Secretary of State for Scotland.

"Just a quick note to thank you for the timely supply of the PHD down gear before my Mt Vinson trip. The gear was absolutely first class. I used the Hispar 1000 down sleeping bag which, if anything, was too warm!"
— Mark Dixon.

"It's absolutely fantastic ... I'm over the moon."
— Simon Horridge

"I have one of your Hispar Bags and think they are amazing."
— Richard Bishop

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