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Pipedream 400 Hydrophobic down sleeping bag

pipedream 400 hydrophobic duck down sleeping bag in blue


  • - pipedream 400 hydrophobic duck down sleeping bag in blue
  • - pipedream 400 hydrophobic duck down sleeping bag in blue

Ultralight 3-season 750 FP hydrophobic goose down sleeping bag with box wall construction, a -6ºC sleep limit and weighing just 865: ideal for fast and light adventures


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Most right-handers prefer left zip bags as it's easier to reach across your body to your left side to use the zip when lying on your back. The opposite is true if you are left-handed.

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  • Full Description
  • Features At A Glance
  • Care & Environmental Advice
  • Customer Reviews

You can have as many sleeping bags as you want – down and synthetic, summer and winter weights – but there’ll always be one bag you immediately reach for to cover all eventualities.

The PipeDream 400 is a lightweight, compressible bag with an excellent warmth to weight ratio. We’ve used 400 grams of 750 fill power down to provide lots of lofty warmth without compromising on weight. With no unnecessary features, weighing a mere 865 g and packing down as small as 19x14 cm (smaller than your average melon - the fruit, not your head), it’s the ideal bag for multiday backpacking, bikepacking and cycle touring.

There are lots of variables (including how much you’ve had to eat before bed - eating a full wheel of camembert usually does the trick!), but, for us, the PipeDream 400 is the ideal level of down fill for 3-season use in the UK, summer alpine climbing, or even as a liner bag for winter use.  

Horizontal box-wall baffles eradicate cold spots and prevent down migration and a tapered mummy shape ensures the bag is as thermally efficient as possible by reducing the amount of internal air. The drawcord hood closure, neck baffle and full-length zip baffle keep out draughts, trapping precious warm air when the temperature drops. 

The PipeDream 400 has a water-resistant PFC-free DWR coating, so the odd drip of condensation or early morning dew won't ruin your bag’s insulation. DownTek™ Hydrophobic down also loses less of its warmth when wet, dries quicker and recovers better from moisture.

Product Insight
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Key features
  • 750 FP RDS-approved down provides a great warmth to weight ratio and is super compressible
  • C0 DWR treated outer and DownTek™ PFC-Free hydrophobic down resist damp and moisture ingress
  • Narrow, tapered mummy shape reduces internal air space and increases thermal efficiency
  • Horizontal box-wall baffles reduce down migration and prevent insulation cold spots
  • Adjustable head closure, sculpted neck baffle and full-length zip baffle keep out draughts
  • Cotton lofting bag for storage and compression stuff sack included
Vital stats
Temperature ratings


AK Sleep Limit
The majority of our customers will find this to be the tipping point between a comfortable and restless nights sleep.

Thermal test results from the lab ABOUT OUR RESULTS
TOG Leeds Comfort EN13537 Comfort EN13537 Limit EN13537 Extreme*
11 -13˚C -4.2˚C -10.8˚C -29.5˚C

* The Extreme rating is the temperature at which the average woman can remain for six hours without risk of DEATH from hypothermia - but can still sustain cold injuries - under EN13537 conditions. We do not recommend using this bag in these weather conditions, or making your purchasing decision based on this value.

This rating is for the PipeDream Regular.
PipeDream XL contains the same quantity of down as Pipedream Regular. As a result, Pipedream XL may be up to two degrees cooler than the PipeDream Regular



Fill: 90/10 Grey goose down: RDS certified & DownTek PFC-Free Hydrophobic
Fill power: IDFB 750
Fill weight: 400 g
Inner: 20D Polyester, 45 g/m2
Outer: 20D Polyester, 45 g/m2
Construction: Box-wall


  Reg Long
Weight 865 g 910 g
Internal length 190 cm 210 cm
Internal width 75 cm 75 cm
Zip Length 160 cm 160= cm
Stuff Bag Weight 30 g 30 g
Packed Size ⌀18 x 25 cm ⌀21 x 28 cm
Compressed size* ⌀ 19 x 14 cm ⌀ 21 x 15 cm
*Straps not included

Environmental Considerations


DownTek-treated down absorbs less water than untreated down. This means it retains its loft better in damp or humid conditions, dries quicker, and recovers better too, keeping you warmer in damp environments than untreated down.
DownTek is environmentally safe - Bluesign approved, PFC, PFOA, and PFOS free – and uses only RDS certified down sources.
Remember, it’s better not to get your down wet – even water repellent down is no substitute for a waterproof shell!


We use only RDS certified down; all our down is audited by a third party to ensure that it comes from birds who are not live-plucked, force-fed, or mistreated. That’s good to know.

Product Care Information

Despite using Downtek water repellent down, we’d still recommend packing your PipeDream in a waterproof Airlok or Airlok Extra when you’re going nice places and doing good things.

It’s best to store your sleeping bag in the supplied cotton lofting bag and in a dry environment to avoid damaging the down.

What You Say: Customer Reviews and Comments

1 Reviews


Used this product?

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Warm and toasty

I have had this bag for some time now and it’s brilliant. Packs down exceptionally small (great for bike packing) and is very light. Yet it’s super warm. Can’t recommend this enough if you want small, light but warm.

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