ultra small sleeping bag or equivalent

[quixoticgeek]

So, I’ve entered an ultra race (RATN) and am looking at sleeping gear... it got down to 2degrees last year and I sleep pretty cold on audax rides so I’m looking for something pretty warm with hood but packs down to a tiny size....

Bag wise I’m considering a remortgage & one of these:
Sea to summit spark sp2
Theramrest Hyperion 32 UL
Western mountaineering HighLite

Any opinions or options I’m missing?

Thanks

Tundra pure 0. It's the bag I wish I'd taken with me on Ratn '19. I own it, but hadn't expected it to be below 10°C on Ratn, so took a As Tucas sestrals quilt instead. It wasn't warm enough...

J

[Bolt]

2 degrees is pretty cold

For PBP and summer activities I was using in various combinations

  Alpkit Numo 403g, cost 45
  Sol Escape Lite bivvy bag 165g, cost 50
  Rab Module 100  500g, second hand cost I think 100 quid (don't remember)

The Numo and the Sol Escape Lite bivvy are the lightest things you will get in this price range.
The Rab Module is warm, not sure if it would do 2 degrees

I have a spreadsheet with various options.  These are mostly for summer and not 2 degrees but you might find some useful info there

https://docs.google.com/spreadsheets/d/1QjOZttzZnxd_ceRT_880DAY_bKxn6QIs78mGPHXQhYE/edit?usp=sharing

I've also used an Alpkit Airo 180 self inflating mat ( a tiny bit heavier and not as comfy as the Numo but quicker to inflate ) and an Army surplus Goretex bivvy (weight and pack size was a problem)  See https://audaxing.wordpress.com/2018/07/01/old-and-new-lightweight-camping-gear/
for size comparisons

Some good info here, thanks

[Bobby]

Thanks for the ideas, research continues... my follow-on stupid question is “what do people wear on these ‘don’t stop for long ultra race bivvy rests?’”

[quixoticgeek]

Thanks for the ideas, research continues... my follow-on stupid question is “what do people wear on these ‘don’t stop for long ultra race bivvy rests?’”

Depends. If I'm dry, what ever I was cycling in, if wet, then my sleep clothes (pair of knickers and a merino base layer).

Main thing I change is I have a pair of sealskinz socks that I put on to sleep, these mean that if I get up to go pee, and have to put wet shoes back on, it doesn't make my feet cold and wet.

J

[Bobby]

I went for the sea to summit in the end (most cost effective), seems great, will report back after I’ve tried it outside!