First impressions – Rab Infinity 300 sleeping bag

Rab Infinity 300 sleeping bag – release 2012

“The Infinity 300 gives no compromises yet ticks most boxes for features to come in at such a low weight…I bloody love it. I’m reluctant to hand it back!”

Rab have a new range of sleeping bags out in 2012 – and the Infinity 300 is one of them.

Weighing an impressive 625g (on my scales and excluding stuff sack) it has 300g of 850 (US) fill power european goose down (90/10), neck collar, hood with cords and a half length zip. That’s some impressive specs considering other options on the market where you may not get a hood or zip for ease of use and comfort.

The down is stuffed into longitude baffles which run parallel to the user to ensure thermal efficiency – the idea being to prevent any down slipping sidewards around your torso and thus creating cold spots above.

How the fluffy white stuff is kept in place within each baffle I’m not permitted to say (as of yet) – but it works, even if it’s not something you’ll be used to if familiar with other Rab down sleeping bags.

The shell is highly water resistant

You can maneuver the down to a degree within the baffles if you so wish and it stays there – though to be fair I didn’t feel the need to do this often.

I’ve been using the sleeping bag on every night spent under nylon since the end of August – and if one word sums up this new product from Rab, it’s ‘brilliant’.

In terms of warmth to weight ratio, it’s up there with the best – but what I like about it the most, is the design. There’s no compromise on features. It’s efficient, light and does the job extremely well.

Bed for the night

Thanks to a Pertex Quantum GL inner and outer shell, the down lofts to several inches in next to no time. Just a quick shake will suffice when unpacking and setting up your camp.

The fabric is silky smooth, highly water resistant and down proof. It’s quite translucent, too – you can see all the down clusters within the baffles in a given light.

Even though the zip has some anti-snag tape, on occasion I have caught the inner fabric when squirming around on my bed trying to concoon myself for the night – no tears, no thread pulls, nothing. So, it’s a tough fabric despite how flimsy it feels.

Snug as a bug!

Condensation rolls or pools on the outer fabric, so there’s no fear of the down getting damp within – and when squeezing the air out to pack away into your rucksack, it does so easily. So, the Pertex Quantum GL is very breathable when needs be too.

It’s worth bearing in mind that this particular fabric weighs a measly 25g per square metre and has a tear strength of 1kg – which is 10g per square metre less than the standard Pertex Quantum 20d fabric. Impressive, eh?

I’ve slept in this sleeping bag in temps down to -5c recently in the Lake District and been toasty and warm – even though I’m what you may call a ‘cold sleeper’.

Granted, a decent air mattress will play a contributing factor towards this but I’ve no doubt given the amount of down it will suffice most people to a comfort temperature (not extreme) of around 0c.

I’m 5’11” with a 45 inch chest and can comfortably move around in the sleeping bag. There’s no unwanted compression and it doesn’t feel restrictive in any areas at all. The angular foot box is roomy for my size 10 feet too.

Rab have told me that Leeds University have done some tests on their range of Infinity bags and the results have been extremely favourable – even so, they’ll down play them just to be on the cautious side. Sensible tactic, modest even but I’m not surprised by the results either.

It’s a testament to the design, the quality of fabrics and down used that I’ve been so comfortable when using this sleeping bag regularly – more often several nights in a row. And that’s the thing with sleeping bags in general. Design is crucial for efficiency. Like for like, you could have the same amount of down compared with another brands bag but one maybe warmer than the other. And that’s before considering the quality of the down used and what you’re insulating yourself from the cold ground.

I do have one gripe though – there’s no internal security pocket. Aye, I’m being picky here! After all nothing is perfect. For sure, the minimalists out there may feel they don’t need a hood, collar or even a zip – and to a degree they’re right given the bags comfort temperature range. But some folk will want these home comforts.

The Infinity 300 gives no compromises yet ticks most boxes for features to come in at such a low weight. It is only a sample, so don’t take this as my own personal definitive review.

All said and done, I bloody love it. I’m reluctant to hand it back! It packs down to nothing in your pack if stuffed loose within a larger dry sac and of course weighs bugger all really. In essence, it’s an ideal 3 season sleeping bag for backpackers (unless you’re allergic to down of course).

The RRP and release date? £350 March 2012.


6 Comments Add yours

  1. MixedUpMessedUp says:

    Good review Terry, was very suprised how light this bag was when it turned up at Monsal.

    Be interesting to see how the bag is priced in the new year.


  2. terrybnd says:

    @MixedUpMessedUp – Well, it's not a review per se mate 😉 But aye, it's a damn good sleeping bag. No idea on RRP, but I imagine it will be competitive as Rab's prices usually are. You get a lot of bang for your money with this bag – I honestly didn't want to send it back LOL


  3. I like the concept of longitudinal baffles. It's got impressive loft for 300g of down.


  4. terrybnd says:

    @blogapckinglight – Well, they tend to do baffles like that on expedition bags. Always thought why not on ALL sleep bags. Would seem they're going to do so now.

    The downs top notch but the fabric is what makes it I reckon


  5. Doug .. says:

    I love my Alpine 600 , the best place I've ever slept … however this sounds like a must have for those slightly warmer months , so small and light .
    I've been wondering whether Rab could manufacture a down quilt for “at home” sleeping , I've tried so many and none are a patch on a good Rab bag . I'd be happy to pay a good price ! .. just a thought .


  6. terrybnd says:

    @Doug – Good idea on the quilt. I'll forward the idea on mate. Though, I suppose they could argue if you're keen on a quilt, just unzip a sleeping bag and use it that way? lol


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