Cart Contents0

Hispar 500 Down Sleeping Bag: K Series

Hispar 500 Down Sleeping Bag: 'K Series'
Hispar 500 Down Sleeping Bag: 'K Series'Hispar 500 Down Sleeping Bag: 'K Series'Showing collar and double draft tubeIn Burnt Orange Ultrashell fabric. Detail of short side zip (full zip optional)In Charcoal UltrashellHispar 500 Down Sleeping Bag: 'K Series'

The lightest bag tested yet warmer than some ... the Hispar 500 is my favourite of the bags tested.
Chris Townsend, Winter Down Sleeping Bags test, TGO Magazine.

Hispar 500 Down Sleeping Bag: K Series

Warmth to weight taken to the limit with our 'K Series' version of this mountain lightweight for cold conditions. Ideal for fast ascents and quick travel.
Typical Operating Temp:-15°C (5°F)
Weight:770g (27oz)
Price:$852.45

Available Options:

Length:
Width:
Outer Fabric:
Zip:

Features

  • PHD 'K Series': Ultimate warmth/weight performance
  • Unique PHD 1000 fillpower Down
  • Outer: Ultrashell, our lightest-ever Water-resistant fabric
  • Inner: Superlight 10X, our lightest-ever downproof fabric
  • Box-wall construction for max loft
  • Short zip protected by double draft tubes
  • Pack size†: 20 x 34cm*****
  • 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
  • Mummy hood draws up close around head
  • Collar seals in warmth at neck
  • Stuff sac with mesh storage bag
  • Options:
    • Waterproof HS2 outer fabric shell‡
    • 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 HS2 outer is a complete extra outer shell, with seams taped for weatherproofness. The extra layer of fabric adds considerably to the weight and bulk of the basic bag. It increases the weatherproof qualities of the bag in mountain or Arctic situations, but it is not a substitute for a proper bivvy bag when sleeping out in the rain.

*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.
  • 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.

As used by Jo Meek on the Everest Trail Race.

Need this bag faster? Check out the 'Ready Made' version, which ships within 5 working days.

Technical

Ultrashell (weight: 40gsm)

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. Order samples of this fabric & just pay the postage.

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. Order samples of this fabric & just pay the postage.

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 about 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.

Waterproof HS2 outer fabric (weight: 88 gsm)

HS2 is PHD's high-spec 2-layer ripstop for waterproof outers on our down. It is light enough to be the optional taped shell on our sleeping bags and tough enough for expedition use in our Omega clothing. HS2 is completely waterproof (when the seams are taped) and offers excellent breathability. Order samples of this fabric & just pay the postage.

Sizing

Hispar Sleeping Bag Size Charts

The measurements in the Sleeping Bag Chart below are personal body measurements.

Length Height
Short 170cm and below (5' 7" and below)
Standard 172-186cm (5' 8" - 6' 1")
Long 187-203cm (6' 2" - 6' 8")
Extra Long 204-216cm (6' 9" - 7' 1")

Width Chest
Slim 78-92cm (31" - 36")
Standard 93-107cm (37" - 42")
Wide 108-125cm (43" - 49")
Extra Wide 126-142cm (50" - 56")

Reviews

"My Hispar 500 K is awesome, used it first time on Mont Blanc in October this year."
Kevin Bloor

The reviews below relate to standard Hispar 500, which is 145g heavier


"The lightest bag tested yet warmer than some ... The Hispar 500 really does deserve the description 'Ultralight' ... The loft really is astonishing for such a lightweight bag ... the Hispar 500 is my favourite of the bags tested."
Chris Townsend, Winter Down Sleeping Bags test, TGO Magazine.

"I took a PHD Hispar 500 on a 10-night trip to the Patagonian ice cap. The Hispar's lofting ability was extremely impressive. The bag's outer was pleasantly resistant to tent condensation and sleety drizzle. At only 900g its warmth-to-weight ratio seems unbeatable. Worth every penny for icy wild camping."
Chiz Dakin, Review in Trail Magazine.

"I used a Hispar 500 Down Sleeping Bag on the Imperial College Reru Valley expedition. The Hispar 500 has an excellent temperature range, and was comfortable both on a glacier at 5700m and at basecamp on the valley. It packed small, was incredibly light and hugely versatile."
Jonathan Moodie - Imperial College Reru Valley Expedition team leader (Zanskar Himalaya, India)

"The Hispar 500s were very warm, light and packed with relative ease. Even with condensation and freezing on the outer surface of the bag (-20C), very comfortable sleeping temperatures were maintained in the bag."
Jonathan Phillips, Imperial College, Obra Valley Expedition (GARHWAL HIMALAYA, INDIA)

"Thank you for the fantastic equipment. Everything (including the Hispar 500 down sleeping bag) was above and beyond what was required and fended off the elements perfectly."
Graham B, on a trip to Aconcagua.

"I'm very pleased with my Hispar 500."
Jake L

"It gives a nice snug fit without being too restrictive. What really impressed me was the amount it lofts, the 1000 down appears to really do its job. Once out of its bag it grows and grows and grows! It's amazing that such a light bag can be so fat. I was sad enough to weigh it with it coming in at 935 grammes with stuff sack, pretty light for a -15 C rated bag with a water resistant shell. I can be an outdoor shop customer from hell inspecting every seam and stitch of everything I buy (usually being pretty unimpressed by the poor construction of kit these days and often finding fault). However so far I have not found even so much as a loose thread."
Review at Backpackingbongos.

Features

  • PHD 'K Series': Ultimate warmth/weight performance
  • Unique PHD 1000 fillpower Down
  • Outer: Ultrashell, our lightest-ever Water-resistant fabric
  • Inner: Superlight 10X, our lightest-ever downproof fabric
  • Box-wall construction for max loft
  • Short zip protected by double draft tubes
  • Pack size†: 20 x 34cm*****
  • 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
  • Mummy hood draws up close around head
  • Collar seals in warmth at neck
  • Stuff sac with mesh storage bag
  • Options:
    • Waterproof HS2 outer fabric shell‡
    • 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 HS2 outer is a complete extra outer shell, with seams taped for weatherproofness. The extra layer of fabric adds considerably to the weight and bulk of the basic bag. It increases the weatherproof qualities of the bag in mountain or Arctic situations, but it is not a substitute for a proper bivvy bag when sleeping out in the rain.

*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.
  • 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.

As used by Jo Meek on the Everest Trail Race.

Need this bag faster? Check out the 'Ready Made' version, which ships within 5 working days.

Technical

Ultrashell (weight: 40gsm)

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. Order samples of this fabric & just pay the postage.

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. Order samples of this fabric & just pay the postage.

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 about 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.

Waterproof HS2 outer fabric (weight: 88 gsm)

HS2 is PHD's high-spec 2-layer ripstop for waterproof outers on our down. It is light enough to be the optional taped shell on our sleeping bags and tough enough for expedition use in our Omega clothing. HS2 is completely waterproof (when the seams are taped) and offers excellent breathability. Order samples of this fabric & just pay the postage.

Sizing

Hispar Sleeping Bag Size Charts

The measurements in the Sleeping Bag Chart below are personal body measurements.

Length Height
Short 170cm and below (5' 7" and below)
Standard 172-186cm (5' 8" - 6' 1")
Long 187-203cm (6' 2" - 6' 8")
Extra Long 204-216cm (6' 9" - 7' 1")

Width Chest
Slim 78-92cm (31" - 36")
Standard 93-107cm (37" - 42")
Wide 108-125cm (43" - 49")
Extra Wide 126-142cm (50" - 56")

Reviews

"My Hispar 500 K is awesome, used it first time on Mont Blanc in October this year."
Kevin Bloor

The reviews below relate to standard Hispar 500, which is 145g heavier


"The lightest bag tested yet warmer than some ... The Hispar 500 really does deserve the description 'Ultralight' ... The loft really is astonishing for such a lightweight bag ... the Hispar 500 is my favourite of the bags tested."
Chris Townsend, Winter Down Sleeping Bags test, TGO Magazine.

"I took a PHD Hispar 500 on a 10-night trip to the Patagonian ice cap. The Hispar's lofting ability was extremely impressive. The bag's outer was pleasantly resistant to tent condensation and sleety drizzle. At only 900g its warmth-to-weight ratio seems unbeatable. Worth every penny for icy wild camping."
Chiz Dakin, Review in Trail Magazine.

"I used a Hispar 500 Down Sleeping Bag on the Imperial College Reru Valley expedition. The Hispar 500 has an excellent temperature range, and was comfortable both on a glacier at 5700m and at basecamp on the valley. It packed small, was incredibly light and hugely versatile."
Jonathan Moodie - Imperial College Reru Valley Expedition team leader (Zanskar Himalaya, India)

"The Hispar 500s were very warm, light and packed with relative ease. Even with condensation and freezing on the outer surface of the bag (-20C), very comfortable sleeping temperatures were maintained in the bag."
Jonathan Phillips, Imperial College, Obra Valley Expedition (GARHWAL HIMALAYA, INDIA)

"Thank you for the fantastic equipment. Everything (including the Hispar 500 down sleeping bag) was above and beyond what was required and fended off the elements perfectly."
Graham B, on a trip to Aconcagua.

"I'm very pleased with my Hispar 500."
Jake L

"It gives a nice snug fit without being too restrictive. What really impressed me was the amount it lofts, the 1000 down appears to really do its job. Once out of its bag it grows and grows and grows! It's amazing that such a light bag can be so fat. I was sad enough to weigh it with it coming in at 935 grammes with stuff sack, pretty light for a -15 C rated bag with a water resistant shell. I can be an outdoor shop customer from hell inspecting every seam and stitch of everything I buy (usually being pretty unimpressed by the poor construction of kit these days and often finding fault). However so far I have not found even so much as a loose thread."
Review at Backpackingbongos.

Related Products

Yukon Down Jacket: K Series
'K Series' version of our box-wall, lightweight mountain down jacket. Warmth to weight at the limit of possibilities via design innovation and unique materials.
from $496.74
365g
-15°C
Minimus Down Trousers
Lightweight down trousers. Widely used year-round for minimalist mountaineering and backpacking.
from $272.09
230g
-5°C
Minimus Down Socks
Unbelievably light down-filled sock for warm feet in cold tents.
from $132.30
90g
N/A
Filler Down Sleeping Bag: 'K Series'
A lightweight liner that boosts your sleeping bag's warmth by 10°C. On its own, the lightest of sleeping bags. A PHD 'K Series' product: warmth to weight at the limit of possibilities.
from $341.98
240g
15°C