Rab Infinity 300 Down Sleeping Bag

-2°C Comfort Limit, 300g of 850+ Fill Power Hydrophobic Down (US Method)
Weighs 650g (excluding pouch)
Code: OC3321
  • Now £299.99
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Infinity Series; Minimalist, ultralight pursuits.

The Infinty 300 is a super-lightweight sleeping bag filled with high quality Rab Fluorocarbon free Hydrophobic, 850 fill European goose down and using very light Pertex Quantum GL fabrics.  

The Infinity 300 is a very lightweight sleeping bag offering very impressive weight to warmth ratios. Weighing in at just 650g and filled with 300g of high quality 850 fill power European goose down.  

An all new Trapezoidal vertical baffle system with Flowgate technology that has been uniquely customised for Rab is used to provide very efficient warmth and the best possible use for the 850 fill European goose down that we use. The proportionally assigned differential cut means the down can loft to it`s full potential and it does visibly `rise` when you take the bag from the stuffsac. The superlight Pertex Quantum GL fabric allows the down to hug the body providing maximum levels of warmth and minimum `dead-space` in the bag.  

The Infinity 300 is an ideal companion for anyone who wants maximum warmth for minimum weight whether for lightweight backpacking adventure racing mountain marathons or for very lightweight mountaineering expeditions.  

EN13537 Temperature Rating

Comfort +3ºC

Lower Comfort -2ºC

Limit Extreme -18ºC

For comparison purposes we quote the Lower Comfort Limit

|Pertex Quantum GL Fabric - Silky fabric used for the ultimate in lightweight pieces. Windproof and the best strength to weight ratio of any Pertex fabric. Click Logo to read more...
|Click here for more info on Rab, product updates and New Season information.

This is a new class of bag for RAB lighter fabric and 850 Fill Power down rather than 800 this is directly reflected in the comfort ratings achieving a highly respectable -2C at an overall weight of 650g. Quantum GL fabric is translucent so you can actually see the spread of the down inside the baffles - any adverse down movement can be rectified easily because you can see what you`re doing!  

To save weight the zipp isn`t quite full length but it does have opposing sliders so you can either vent from the top or the bottom.  

Its a good product that challenges other high quality niche brands that we stock.  

Storage at Ultralight Outdoor Gear Down sleeping bags should be stored loosely to preserve their insulative qualities therefore we store all our down bags in this way as recommended by RAB.

Read reviews here:                                                       


Help and advice:Choosing a sleeping bag adviceEN 13537 rating for sleeping bags explainedAll about down filling in sleeping bags
Sleeping bag shape and sizes adviceSleeping Bag features Page 1Sleepin bag features page 2
|RAB Premier Sleeping Bag Stockist - Ultralight Outdoor Gear is a RAB Premier Sleeping Bag stockist. RAB recognises our knowledge and experience when it comes to advising customers about the sleeping bag that would best meet their needs. It also recognises the comprehensive range of RAB sleeping bags that we stock.
  • Trapezoidal vertical baffle system using Insotect Flow technology specially customised for Rab to control the down
  • Rab Fluorocarbon free Down
  • Mummy taper shape
  • Proportionally assigned differential cut ½ length
  • YKK 5 coil main zip
  • Anti-snag webbing tape on zip baffle
  • Internal collar and hood drawcord for increased comfort
  • Angled footbox
  • Stuff sac
  • Cotton storage sac
  • Hand filled in Derbyshire UK
  • Insotect Flow is a flow-optimized insulation system that delivers uniform heat distribution and natural body contouring through its revolutionary baffle design
  • Flow-optimized architecture
  • It`s the distinction embedded in every Insotect Flow
  • Vertical Thermal Channels create a unique flowing look
  • FlowGate technology enables rapid uniform body heat flow 
  • VTC enhances the rapid transfer and uniform distribution of your body heat over the entire length of your body
  • Unlike conventionally baffled systems this technology frees your insulation to flow with your body - not against it
  • FlowGate technology uses `swinging gates` and the power of positive pressure created by your insulation fill to virtually lock your insulation in place eliminating cold spots and allowing your body heat to flow
  • Fill Power: 850
  • Hydrophobic Down
  • 90/10 goose down
  • Fluorocarbon free Down
  • Fill Weight: 300g
  • Packed size: 18 x 27cm
  • Weighs 650g (bag weights vary slightly as they are hand filled)
  • UOG Comment - we weighed a couple and they varied from +- 10g from the stated 650g - good job.


(6' 2.8in)



EN13537:2012 - Look for the 2012 label for the most accurate rating; In 2012 the EN system of testing sleeping bags was re-vamped - the new testing procedures are more rigorous, producing more consistent results than previous tests. 2012 results tend to rate sleeping bags as poorer performing by a few degrees when compared to previous test results, even though the sleeping bag may be identical, or even better.

This means that comparison between an EN13537:2012 rated bag and an EN13537:2002 rated bag are particularly difficult - our advice is to use the new EN13537:2012 rating to compare with other bags who have also been rated in this way.

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