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Diamir 900 Down Sleeping Bag: K Series

Diamir 900 Down Sleeping Bag: K Series
Diamir 900 Down Sleeping Bag: K SeriesShowing collar and double draft tube.Ovoid shape footbox to fit naturally to feet and avoid pressure1000 fillpower down label.'K Series' label, indicating use of PHD's unique 1000 fillpower downMummy hood draws up close around headDiamir 900 Down Sleeping Bag: K SeriesDiamir 900 Down Sleeping Bag: K SeriesOn test with Trek & Mountain Magazine, Glacier du Geant.

Fantastically light and warm. Exceptional performance for its weight.
Trek & Mountain Magazine

Diamir 900 Down Sleeping Bag: K Series

Warmth to weight taken to the limit with our 'K Series' version of this high-specification expedition bag, cut roomy enough for stashing kit and for comfort at altitude.
Typical Operating Temp:-32°C (-25.6°F)
Weight:1,570g (55oz)
Price:¥143,320

Available Options:

Length:
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
  • Inner water-resistant Ultrashell panels
  • Full length zip protected by double draft tubes*****
  • Pack size: 25 x 44cm†
  • Mummy hood draws up close around head
  • Wide 3D Collar seals in warmth at neck
  • Trapezoid baffle system for ideal down control
  • Special baffle section stabilises down over chest
  • Extra down channels along each side ensure side insulation
  • Side block baffles prevent down shift
  • Ultrashell inner panels at head to protect against breath soaking the down
  • Ultrashell panels at inner foot to cope with damp feet/footwear
  • Footpiece: ovoid shape to fit naturally to feet and avoid pressure
  • Navy blue inner for quick drying
  • Stuff sac with large mesh storage sac
  • Options:
    • Zip location: left or right
    • Short or Long lengths*
    • Waterproof HS2 outer fabric shell ‡

 

†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 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.

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...

This K Series Diamir down sleeping bag takes specialised mountaineering and expedition bags to a new level of lightness. Built for long and arduous challenges it is cut roomy enough for comfort and for stashing vulnerable kit overnight with you. The trapezoid baffles provide a lightweight method of achieving excellent down control, aided by vertically-oriented chest baffles that prevent any chance of down migration.

  • The Ultrashell outer is highly water-repellent and helps to keep the down dry and lofting.
  • The Ultrashell inner panels in the hood and foot area also protect the down.
  • A large 3D shaped collar, side V channels to insulate the side seams, double draft tube behind the zip, and closely-boxed foot section form part of a formidable list of technical specifications.

Pictures show Diamir 1200, Diamir 900 is a little slimmer.

Read why Trek & Mountain think this bag is "Fantastically light and warm. Exceptional performance for its weight."

 

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.

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

PHD's trapezoid baffle system is used throughout. This is the best of the technical baffle systems, combining excellent down control with low baffle weight. In cross section the baffle system looks like this:

The design has a close-fitting down-filled mummy hood, and side V-channels which ensure all areas of the body are insulated. The baffles over the chest are vertically aligned, which stops any horizontal shifting of the down caused by arm movement during the night.
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).

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

Sleeping bag length chart

The measurements in the Sleeping Bag Chart below are personal body measurements (The figures quoted for sleeping bag dimensions vary widely in the way they are calculated and lead to some manufacturers quoting figures apparently suited to giants over 7' (213cm) tall).

Length Height
Short Below 170cm (below 5' 7")
Standard 170-185cm (5' 7" - 6' 1")
Long Over 185cm (over 6' 1")

Reviews

"Fantastically light and warm. Exceptional performance for its weight. The hood ... was one of the best in the test, and it felt one of the warmest bags too; this perhaps was due in some part to the double baffles along the main zip and the tapered shape, as well as the quality and quantity of the down in the bag."
Chris Kempster, Trek and Mountain Magazine's test of Expedition Sleeping Bags.

"I spent over 90 nights in the PHD Diamir 900, and not a single one involved a shiver while sleeping. I slept in my unheated van at trailheads in the San Juans before ice climbing and ski trips; in tents in the mid-winter desert; under a blanket of stars on multi-day ski tours; and everywhere in between.

The Diamir 900's 900 fill down had an unbelievably high weight-to-warmth ratio, as one would expect. Couple that with an almost perfect fit and a waterproof outer, and this bag proved to be perfect for this past winter and for future cold weather expeditions.

I highly recommend this bag to anyone looking for a lightweight, compressible, very warm winter bag that looks like it will last for many seasons to come."
Sam Feuerborn.

"Thank-you for the superb sleeping bag."
Robert De Mey

More...

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
  • Inner water-resistant Ultrashell panels
  • Full length zip protected by double draft tubes*****
  • Pack size: 25 x 44cm†
  • Mummy hood draws up close around head
  • Wide 3D Collar seals in warmth at neck
  • Trapezoid baffle system for ideal down control
  • Special baffle section stabilises down over chest
  • Extra down channels along each side ensure side insulation
  • Side block baffles prevent down shift
  • Ultrashell inner panels at head to protect against breath soaking the down
  • Ultrashell panels at inner foot to cope with damp feet/footwear
  • Footpiece: ovoid shape to fit naturally to feet and avoid pressure
  • Navy blue inner for quick drying
  • Stuff sac with large mesh storage sac
  • Options:
    • Zip location: left or right
    • Short or Long lengths*
    • Waterproof HS2 outer fabric shell ‡

 

†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 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.

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...

This K Series Diamir down sleeping bag takes specialised mountaineering and expedition bags to a new level of lightness. Built for long and arduous challenges it is cut roomy enough for comfort and for stashing vulnerable kit overnight with you. The trapezoid baffles provide a lightweight method of achieving excellent down control, aided by vertically-oriented chest baffles that prevent any chance of down migration.

  • The Ultrashell outer is highly water-repellent and helps to keep the down dry and lofting.
  • The Ultrashell inner panels in the hood and foot area also protect the down.
  • A large 3D shaped collar, side V channels to insulate the side seams, double draft tube behind the zip, and closely-boxed foot section form part of a formidable list of technical specifications.

Pictures show Diamir 1200, Diamir 900 is a little slimmer.

Read why Trek & Mountain think this bag is "Fantastically light and warm. Exceptional performance for its weight."

 

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.

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

PHD's trapezoid baffle system is used throughout. This is the best of the technical baffle systems, combining excellent down control with low baffle weight. In cross section the baffle system looks like this:

The design has a close-fitting down-filled mummy hood, and side V-channels which ensure all areas of the body are insulated. The baffles over the chest are vertically aligned, which stops any horizontal shifting of the down caused by arm movement during the night.
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).

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

Sleeping bag length chart

The measurements in the Sleeping Bag Chart below are personal body measurements (The figures quoted for sleeping bag dimensions vary widely in the way they are calculated and lead to some manufacturers quoting figures apparently suited to giants over 7' (213cm) tall).

Length Height
Short Below 170cm (below 5' 7")
Standard 170-185cm (5' 7" - 6' 1")
Long Over 185cm (over 6' 1")

Reviews

"Fantastically light and warm. Exceptional performance for its weight. The hood ... was one of the best in the test, and it felt one of the warmest bags too; this perhaps was due in some part to the double baffles along the main zip and the tapered shape, as well as the quality and quantity of the down in the bag."
Chris Kempster, Trek and Mountain Magazine's test of Expedition Sleeping Bags.

"I spent over 90 nights in the PHD Diamir 900, and not a single one involved a shiver while sleeping. I slept in my unheated van at trailheads in the San Juans before ice climbing and ski trips; in tents in the mid-winter desert; under a blanket of stars on multi-day ski tours; and everywhere in between.

The Diamir 900's 900 fill down had an unbelievably high weight-to-warmth ratio, as one would expect. Couple that with an almost perfect fit and a waterproof outer, and this bag proved to be perfect for this past winter and for future cold weather expeditions.

I highly recommend this bag to anyone looking for a lightweight, compressible, very warm winter bag that looks like it will last for many seasons to come."
Sam Feuerborn.

"Thank-you for the superb sleeping bag."
Robert De Mey

More...

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