PipeDream 400 is an ultralight, 3-season down sleeping bag with a class-leading warmth-to-weight ratio. Rated to a -6˚C sleep limit, it's designed for spring through autumn camping in Britain, or for summer alpine conditions.

Lightweight and small it's perfect for multi-day backpacking and bikepacking. PipeDream 400 weighs just 865g and compresses to a tiny 19cm x 14cm 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 400 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: -6°C / 21.2°F*
TOG: 11
EN13537 Comfort: -4.2°C / 24.4°F
EN13537 Limit: -10.8°C / 12.6°F
EN13537 Extreme: -29.5°C / -21.1°F**


Fill: 90/10 Grey goose down, DownTek™ PFC-free water repellent, RDS certified
Fill power: IDFB 750
Fill weight: 400g
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: 18 x 25cm (Regular) / 21 x 28cm (Long)
Compressed size: 19 x 14cm (Regular) / 21 x 15cm (Long)


Sleeping bag: 865g (Regular) / 910g (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 400 Regular. PipeDream 400 Long contains the same quantity of down as Pipedream 400 Regular. As a result, Pipedream 400 Long may be up to two degrees cooler than the PipeDream 400 Regular.

Sustainability & Care

Environmental impact


PipeDream 400 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 400 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.

Active Traveller review the Pipedream 400

"The PipeDream 400 is a solid three season sleeping bag at a truly excellent price. Have a quick Google and you're unlikely to find many other sleeping bags offering this combination of weight and performance at this price, making it one of the best value sleeping bags for bikepacking and wild camping out there"

Read the full review here

Trail Magazine Review Pipedream 400

"A popular bag for good reason, with a great balance of performance, packability and value"

Read the full review in Trail Magazine, Issue Spring 2020

Shop PipeDream 400


Pipedream 400 in action