PipeDream 600 is an ultralight, 4-season down sleeping bag with a class-leading warmth-to-weight ratio. Rated to a -12˚C sleep limit, it's designed for winter use in Britain, or for summer alpine conditions. It's the perfect bag for sub-zero backpacking and mountain camping. PipeDream 600 weighs just 1,085g and compresses to a tiny 21cm x 18cm pack size. We've used high quality 750 fill power DownTek™ hydrophobic down which is 100% Responsible Down Standard (RDS) certified for improved performance in damp conditions. PipeDream 600 punches well above its weight for warmth without compromise.


Water repellent down

DownTek™ hydrophobic down stays dry for up to 13.5x longer and dries quicker for better damp performance

High quality insulation

750 fill power goose down provides the best warmth-to-weight ratio to keep your pack weight and size down

Tapered mummy shape

Improves thermal efficiency by decreasing the volume of air inside your sleeping bag

Box-wall baffles

Internal baffle dividers keep your down in place and eradicate cold spots

Product overview

  • High warmth-to-weight ratio 750 fill power down
  • DownTek™ PFC-free Water Repellent down
  • 100% Responsible Down Standard certified
  • Narrow, tapered mummy shape
  • Horizontal box-wall baffle construction
  • PFC-free DWR treated outer
  • Adjustable hood closure with sculpted neck baffle
  • Full-length zip baffle
  • Cotton lofting bag included
  • Stuff sack included
  • 3 year Alpine Bond

Technical details

Temperature ratings

Alpkit sleep limit: -12°C / 10.4°F*
TOG: 13.5
EN13537 Comfort: -10.5°C / 13.1°F
EN13537 Limit: -18.1°C / -0.6°F
EN13537 Extreme: -39.1°C / -38.4°F**


Fill: 90/10 Grey goose down, DownTek™ PFC-free water repellent, RDS certified
Fill power: IDFB 750
Fill weight: 600g
Fabric: 20D polyester, 45g/m²
Construction: Box-wall
DWR: PFC-free C0


Internal length: 190cm (Regular) / 210cm ( Long)
Internal width: 75cm
Zip length: 160cm
Packed size: 21 x 30cm (Regular) / 21 x 30cm (Long)
Compressed size: 21 x 18cm (Regular) / 21 x 18cm (Long)


Sleeping bag: 1,085g (Regular) / 1,145g (Long)
Stuff sack: 30g

*Our recommended usable limit of the bag. The majority of our customers will find this to be the tipping point between a comfortable and restless night's sleep.

**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 600 Regular. PipeDream 600 Long contains the same quantity of down as Pipedream 600 Regular. As a result, Pipedream 600 Long may be up to two degrees cooler than the PipeDream 600 Regular.

Sustainability & Care

Environmental impact


PipeDream 600 uses DownTek™ PFC-free Water Repellent down and a PFC-free durable water repellent (DWR) on its outer fabric. PFCs are potentially harmful and have been found to build up in the environment.

Responsible Down Standard

PipeDream 600 uses 100% 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.

Care instructions

Storage: store your sleeping bag uncompressed in a cool, dry place. This will extend its life and allow it to regain its loft quicker after unpacking.

Liners: using a sleeping bag liner protects your down from skin oils and other contaminants that reduce loft, allowing you to wash your bag less frequently.

Off Road cc review PipeDream 600

Won 'Best Value'! "The Alpkit PipeDream 600 impresses with an exceptional performance, reasonably low weight and a usefully small pack size. It's good value compared to the competition too." 

Read the full review here

Trek & Mountain review Pipedream 600

With this comparatively low weight (1065g) and no unnecessary features, the PipeDream 600 the ideal bag for fast and light sub-zero expeditions.

Read the full review here