backside ice x sleeping bag

A -30 synthetic bag will take up most of your pack's volume.

All those offerings are heavy.

i'll be on a bike so size and weight are not as important

curious where you can bike and still need a -30 bag..

*shivers in my tights and booties thinking about it* gahhh

I'll be riding a fatbike designed for snow.
http://www.arrowheadultra.com/index.php

race rules require a -20F bag, tent or bivy and insulated sleeping pad.

With sleeping bags you usually get what you pay for. At only $150 or so…either the bag won't be nearly as warm as they claim or the synthetic insulation will degrade quickly after packing a few times (again making it less warm than advertised). If you look at comparable synthetics in this temp range, that have been EN rated, they still run $300+. The North Face Dark Stars are also around 5-6 lbs depending on temp (-20F and -40F) and have one of the highest rated name brand synth insulations on the market (Climashield Prism and Apex. Primaloft is slightly warmer but needs quilting causing seams that reduce warmth).

Looking at some of their marketing spiel I don't buy it. They say wide is better, but for thermal efficiency narrow bags require less energy to warm up and thus help you sleep warmer, even if you sleep a bit claustrophobic.

I personally wouldn't trust it in such cold weather. I'm sure it'll keep you from freezing to death, but "not dying" and "not being miserably cold all night" are two very different conditions!

I found this:
http://www.backpackinglight.com/cgi-bin/backpackinglight/forums/thread_display.html?forum_thread_id=42007

kind of dated though

Dustin wrote "With sleeping bags you usually get what you pay for." I would expand this to hookers, blow, and chineese food.

You've obviously spent a pretty penny on bike related gear, heck I could use those tires on my Subaru, so dig deep and buy a real bag.

i never skimp on h&b. I'm somewhat reluctant to spend $300 on a bag I might not even use. you are required to carry the bag, but you could ride straight through the night without stopping. if you do bivy, there are 9 shelters along the trail. these are 3 sided with fire pits and should provide a bit of protection from wind.

I do have a line on borrowing a bag and bivy from a friend. I could just pursue this angle. I thought if I could purchase a decent bag at a reasonable price, I might.

i did find this one:
http://www.mountainhardwear.com/Lamina™–30-%28Regular%29/OU8446_R,default,pd.html

I wouldn't trust that bag without verifying its loft. For -20 you want at least 4-5 inches above you.

I have a good -20 down bag posted here:

http://tinyurl.com/9lerrgj

I'll cut that to $350.00 shipped if you are interested. (I have a different -20 and -40 bag, that is why they were offered.)

The -40 Cwm already sold.

I am leaving tomorrow morning for 3 weeks of hiking and some visiting in CA, and will be back on Oct 11.