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Rab Infinity 500

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The Rab Infinity 500 is a light down sleeping bag stuffed with the highest quality 850 fill European goose down. It is ideally suited to winter Alpine use, British winter mountaineering or any other situation where high levels of warmth must be combined with good packability and low weight.

The Infinity series feature Petex Quantum GL outers; which offer the best weight to durability ratio of any Pertex fabric available. Combine this with 500g of 850 fill, high spec goose down and you've got one of the very best bags in terms of warmth to weight ratio.

Rab have fitted the Infinity with a trapezoidal vertical baffle system with 'Flowgate technology', which has been uniquely customised to provide supremely efficient warmth by keeping the down equally distributed throughout the bag. The proportionally assigned differential cut means the down can loft to its full potential quickly and visibly 'rises' when you take it out of its stuff sac. The super light Pertex Quantum GL fabric also allows the down to hug the body, providing minimum 'dead-space' and thus keeping you warmer.

More Help? For further assistance on choosing your down sleeping bag, please view the various help videos available under the 'Videos' tab above. We also have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: Down Sleeping Bags.

Pertex Quantum® GL fabric
850FP European Goose Down
Trapezoidal vertical baffle system using Insotect FlowTM technology
Mummy taper shape
Proportionally assigned differential cut Fabric Warp Weft
Anti snag zipper webbing tape
Synthetic insulation zip baffles
Internal collar and hood drawcord
Angled footbox
Stuff sack
Cotton storage sack
Hand filled in Derbyshire UK

Perfect for: Winter Alpine, Brittish Winter Mountaineering or Winter Backpacking


  • Compression Size: 38 x 30 cm
  • Length: 190cm
  • Manufacturer: Rab
  • Mpn: QSI-15-LZ
  • Fill power: 850+US Hydrophobic European Goose Down
  • Weight: 875g (+27g stuffsac)

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  • Reviews (3)
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Guillaume R.

Warm, light

Used it for 0"C to -10"C nights, was happy with it, thanks

Derek S.
United Kingdom

Rab Infinity 500

Superb quality, loft is exceptional, very warm and the design is excellent Fast delivery in the from factory bag, so I know has not been stored or shipped compressed. Excellent and good to know that rock and run are storing and delivering these high quality bags correctly

Sue A.
United Kingdom

Excellent service

The sleeping bag is going to be used by a medic who is supporting an ultra marathon in the Himalayas, and the type of sleeping bag was chosen especially for lightness and warmth. Dry run in the Highlands of Scotland has proved its worth in all respects. Delivery to local pickup address speedy and efficient, thank you Rock & Run.

Sue A. verified customer review of Rab Infinity 500


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