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Filler Down Sleeping Bag: 'K Series'

Filler Down Sleeping Bag: 'K Series'
Filler Down Sleeping Bag: 'K Series'Filler Sleeping BagFiller Sleeping bag inside a Minimus bag (sold separately)Filler Sleeping bag inside a Minimus bag (sold separately)Filler Down Sleeping Bag: 'K Series'Filler Down Sleeping Bag: 'K Series'Filler Down Sleeping Bag: 'K Series'Filler Down Sleeping Bag: 'K Series'Filler Down Sleeping Bag: 'K Series'Using the Filler plus another Bag kayaking in Greenland. It's easier to stow 2 smaller bags rather than 1 big one.

A genius idea.
Trail Running Magazine.

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.
Typical Operating Temp:15°C (59°F)
Weight:240g (8oz)
Price:¥39,348

Available Options:

Width:
Length:

Features

  • Neck-length bag
  • Fits inside main bag to boost warmth. Or an ultralight summer bag by itself
  • Unique PHD 1000 fillpower Down
  • Outer and inner: Ultralight 10X, our lightest-ever down-proof fabric
  • Construction: Stitch through seams for lightness
  • Stretch draw cord with cord lock at shoulder
  • Pack Size*: 10cm x 18cm*****
  • Footpiece: Ovoid shape to fit naturally to feet and avoid pressure; multibox section covers whole foot area
  • Stuff-sac and mesh storage bag supplied
  • Colour: Navy blue
  • Options:
    • Slim, Wide, and Extra Wide widths†
    • Short, Long, and Extra Long lengths†

 

*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.

Description

This is the lightest PHD bag ever for the minimalists. But it's called the Filler Bag because that's what it was primarily designed for, to fill the space inside your ordinary bag, providing significant extra warmth at the lowest possible weight.

Our Minim Combi and Hispar Combi bags perform really well as overbags, adding their insulation on the outside. The beauty of the Filler concept is that it works from inside, softly expanding into the unused space and cutting out the convection currents. The result is a much lighter 'combi', less than a third the weight of our external Combis and a quarter of the bulk.

Does it really work?

Yes, it does. When the temperature's dipping too low for your Ultra K or Minimus bag, you'll find this little extra will shift the shivers. Of course it's not as warm as the external Combis, which will add about 20°C to the temperature rating of your bag. The Filler can add up to 10°C, putting it squarely in the frame for ultralight camping beyond the summer season. It's aimed at boosting lightweight bags, but of course it will work inside any bag anywhere.

Is it comfortable?

Yes, it's as wide as our standard ultralight bags, so there's no feeling of restriction, and it's so soft that it will naturally fill those empty spaces around you. And there certainly are spaces, even in slim-cut bags: few of us would accept the straight-jacket effect of a truly body-fitting bag. The Filler bag offers the best of both worlds: you keep the freedom to move and you get rid of those cold spaces at the same time.

Materials

When it came to the materials to make the most of this design concept we had no choice, we had to use 1000 down and our new 10X fabric. The unique piece of kit we ended up with weighs just 240gm and goes into our size 0 stuff sac (10 x 18 cm).

Solo Use

Just coming back to where we started, using the Filler as a single sleeping bag. It's shoulder length (closes at the neck), so you'll need some kind of head cover. And what you're wearing inside will make a big difference to the temperature rating.

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

Technical

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.

Sizing

Lightweight Sleeping Bags Sizes

The measurements in the tables below are personal body measurements.

Length Height
Short 168cm and below (5' 6" and below)
Standard 169 - 184cm (5' 7" - 6')
Long 185 - 201cm (6' 1" - 6' 7")
Extra Long 202 - 213cm (6' 8" - 7')

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

Reviews

"A genius idea"
Trail Running Magazine

"I have a long-held belief in the 'layering principle' extending into sleeping bags. PHD's bags suit a multitude of adventure activity situations including:

  • Expedition sea kayaking
  • Himalayan style trekking where you travel through a wide range of temperature zones
  • Cycle touring where there is a similar packing issue to sea kayaking and potential for travelling through temperature zones
  • Plus, anyone who needs to use their sleeping bag across seasons. E.g. Just 'layer up' to convert your summer bag into a 'winter warmer'
During recent sea kayak expeditions in Greenland, my PHD Combi, Minimus, and Filler bags were tested in temperatures ranging from just above freezing to as low as -10°C. It is a pleasure, when you know the temperature is dropping, just to slip into another bag and double the warmth factor"
Sam Cook

""I 'bivvied' in the snow on the fell above my house. Inside a bivvy bag I was as 'snug as a bug' in the Combi and Filler. So much so that I slept until 8am. The temperature dropped to about -6°C."
S.C.

"I used the Filler Bag in the Alps with great success. I happily slept in it, albeit with a vest and hat on, at temperatures down to around 12 degrees C and was perfectly comfortable. Saved a lot of pack weight. Thanks for a great product, the down you use is obviously of a very high quality."
Mike Jones.

"PHD has reminded us once again why it is one of the world's best manufacturers of lightweight gear with the release of its super-light 240g Filler Bag. When used inside a sleeping bag, the Filler is designed to expand in the unused space and cut off convection currents to add 10C of warmth. It can be compressed into an impressively small size zero PHD stuff sac (10x18cm)."
TGO Magazine.

Features

  • Neck-length bag
  • Fits inside main bag to boost warmth. Or an ultralight summer bag by itself
  • Unique PHD 1000 fillpower Down
  • Outer and inner: Ultralight 10X, our lightest-ever down-proof fabric
  • Construction: Stitch through seams for lightness
  • Stretch draw cord with cord lock at shoulder
  • Pack Size*: 10cm x 18cm*****
  • Footpiece: Ovoid shape to fit naturally to feet and avoid pressure; multibox section covers whole foot area
  • Stuff-sac and mesh storage bag supplied
  • Colour: Navy blue
  • Options:
    • Slim, Wide, and Extra Wide widths†
    • Short, Long, and Extra Long lengths†

 

*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.

Description

This is the lightest PHD bag ever for the minimalists. But it's called the Filler Bag because that's what it was primarily designed for, to fill the space inside your ordinary bag, providing significant extra warmth at the lowest possible weight.

Our Minim Combi and Hispar Combi bags perform really well as overbags, adding their insulation on the outside. The beauty of the Filler concept is that it works from inside, softly expanding into the unused space and cutting out the convection currents. The result is a much lighter 'combi', less than a third the weight of our external Combis and a quarter of the bulk.

Does it really work?

Yes, it does. When the temperature's dipping too low for your Ultra K or Minimus bag, you'll find this little extra will shift the shivers. Of course it's not as warm as the external Combis, which will add about 20°C to the temperature rating of your bag. The Filler can add up to 10°C, putting it squarely in the frame for ultralight camping beyond the summer season. It's aimed at boosting lightweight bags, but of course it will work inside any bag anywhere.

Is it comfortable?

Yes, it's as wide as our standard ultralight bags, so there's no feeling of restriction, and it's so soft that it will naturally fill those empty spaces around you. And there certainly are spaces, even in slim-cut bags: few of us would accept the straight-jacket effect of a truly body-fitting bag. The Filler bag offers the best of both worlds: you keep the freedom to move and you get rid of those cold spaces at the same time.

Materials

When it came to the materials to make the most of this design concept we had no choice, we had to use 1000 down and our new 10X fabric. The unique piece of kit we ended up with weighs just 240gm and goes into our size 0 stuff sac (10 x 18 cm).

Solo Use

Just coming back to where we started, using the Filler as a single sleeping bag. It's shoulder length (closes at the neck), so you'll need some kind of head cover. And what you're wearing inside will make a big difference to the temperature rating.

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

Technical

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.

Sizing

Lightweight Sleeping Bags Sizes

The measurements in the tables below are personal body measurements.

Length Height
Short 168cm and below (5' 6" and below)
Standard 169 - 184cm (5' 7" - 6')
Long 185 - 201cm (6' 1" - 6' 7")
Extra Long 202 - 213cm (6' 8" - 7')

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

Reviews

"A genius idea"
Trail Running Magazine

"I have a long-held belief in the 'layering principle' extending into sleeping bags. PHD's bags suit a multitude of adventure activity situations including:

  • Expedition sea kayaking
  • Himalayan style trekking where you travel through a wide range of temperature zones
  • Cycle touring where there is a similar packing issue to sea kayaking and potential for travelling through temperature zones
  • Plus, anyone who needs to use their sleeping bag across seasons. E.g. Just 'layer up' to convert your summer bag into a 'winter warmer'
During recent sea kayak expeditions in Greenland, my PHD Combi, Minimus, and Filler bags were tested in temperatures ranging from just above freezing to as low as -10°C. It is a pleasure, when you know the temperature is dropping, just to slip into another bag and double the warmth factor"
Sam Cook

""I 'bivvied' in the snow on the fell above my house. Inside a bivvy bag I was as 'snug as a bug' in the Combi and Filler. So much so that I slept until 8am. The temperature dropped to about -6°C."
S.C.

"I used the Filler Bag in the Alps with great success. I happily slept in it, albeit with a vest and hat on, at temperatures down to around 12 degrees C and was perfectly comfortable. Saved a lot of pack weight. Thanks for a great product, the down you use is obviously of a very high quality."
Mike Jones.

"PHD has reminded us once again why it is one of the world's best manufacturers of lightweight gear with the release of its super-light 240g Filler Bag. When used inside a sleeping bag, the Filler is designed to expand in the unused space and cut off convection currents to add 10C of warmth. It can be compressed into an impressively small size zero PHD stuff sac (10x18cm)."
TGO Magazine.

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