Standard delivery to UK addresses is free over £50.

Next Day deliveries will be shipped same day if you place your order before 2pm Monday - Friday.

If you are not happy or have changed your mind you can return your unused product within 123 days of placing the order for a refund. Simply return it to us, free of charge, with all the original packaging.


Ultra 120 is the highest performance synthetic sleeping bag available using PrimaLoft® Gold to give a 1°C sleep limit and a tiny pack size.

Inspired by ultra racing, it's ideal for fast and light adventures when weight, reliability and small pack size are crucial.

Highly compressible and weighing just 580g, Ultra 120 fits easily into bikepacking bags and mountain marathon packs. We've used PrimaLoft® Gold, the highest quality of synthetic insulation available, for its excellent warmth-to-weight ratio. PrimaLoft® is water repellent too, staying reliably warm on longer trips when you can't guarantee to keep your sleeping bag dry.

Wrap yourself in gold.


PrimaLoft® Gold insulation

The highest qualit synthetic insulation available for the best warmth-to-weight ratio

Ultralight construction

120gsm PrimaLoft® Gold, ultralight 20D nylon fabric and a half-zip to save weight without compromising on warmth

Reliable damp performance

Water repellent PrimaLoft® insulates even when damp and dries quickly. The outer fabric is PFC-free DWR treated

Tapered mummy shape

Thermally efficient shape with room for clothes and a liner to tailor your sleep system to the conditions

Product overview

  • High warmth-to-weight ratio PrimaLoft® Gold
  • Water repellent PrimaLoft® insulation
  • Lightweight and compressible construction
  • Tapered mummy shape with room for clothes
  • PFC-free DWR treated outer fabric
  • Adjustable hood and collar
  • Half zip saves weight
  • Full length zip baffle
  • 3 year Alpine Bond

Technical details

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

Temperature Ratings

AK Sleep Limit 1°C / 33.8°F


Fill: Primaloft Gold
Inner: 420T nylon
Outer: 20d 420T nylon
Construction: Stitch-through
DWR: PFC-free C0


  Regular Long
Internal length 190 cm 210cm
Internal width 75 cm
Packed size ⌀22 x 15 cm ⌀22 x 16 cm


  Regular Long
Sleeping bag 580 g 640 g
Stuff bag 20 g
Fill 120 gsm



Sustainability and Product Care

Environmental impact

Recycled content

PrimaLoft® Gold is made from 55% recycled polyester, from post-consumer sources

PFC-free DWR

Ultra 120 uses a PFC-free DWR treatment on its outer fabric. PFCs are potentially harmful and have been found to build up in the environment

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.

We have dedicated Repair Stations in our stores and we're fully equipped to breathe new life into your old kit. This includes spare parts, patches, new zips and wash and reproofing of your down and waterproofs. Pop into any store or contact us online for more info.

Alpine Bond
If one of our products does not meet your expectations upon delivery, or if during its lifetime does not live up to the demands placed upon it, please return it to us for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction. If it’s your fault then we will help out the best we can. Find out more about our Alpine Bond here.

How It Is Made

Recycled content
PrimaLoft® Gold is made from 55% recycled polyester, from post-consumer sources

PFC-free DWR
Ultra 120 uses a PFC-free DWR treatment on its outer fabric. PFCs are potentially harmful and have been found to build up in the environment

Where It Is Made

Our products are made in the best factories in the world. We know the factories personally and they have all signed up to our Code of Ethics in our supply chain. This includes the Ethical Trading Initiative base code, fair pay, safe working environments, no child labour, no modern slavery, no bribery or corruption, no materials from conflict zones and humane farming methods.

All our factories sign up to our Code of Conduct. Find out where we make our product by visiting our Factories of Alpkit factory zone.

Reducing our carbon footprint

We are carbon neutral under PAS2060 and offset our Scope 1, Scope 2 and Scope 3 operations and transport emissions. We recognise that offsetting is not part of the solution but a point to pass through on a journey to Net Zero. Carbon Neutral is just a step in that journey.

We have joined the Science Based Targets Initiative which sets independent targets for us to achieve to do our bit to limit global warming to 1.5°C. Our targets are to halve our Scope 1 and Scope 2 emissions by 2025 based on 2018 base year and reduce our total carbon intesnity by 15% every year to achieve genuine net zero by 2050.

End of life
When your partnership with this product is over send it back to us and we will pass it on to someone that needs it through our Continuum Project.