Jim Robinson

Jim Robinson

Northeast US, and wherever else I can get to...

James's Passions

Hiking & Camping

James's Bio

I like going on long walks in the woods, kayaking in the surf, and stretching myself to do longer workouts (triathlons)...

Jim Robinson

Jim Robinson wrote an answer about on December 25, 2013

I don't understand how it would not fit an Xtherm, but I do not own it (I do own an Xtherm). The Xtherm is 20" wide at widest and is tapered. The Ridge Master length posted here is wrong, I believe. On Rab's site, it is listed as 110" (and I've seen it a few other places). If you keep the mattress at the top and leave the space at the bottom (either 28" or 38" to spare - depending on actual length of Ridge Master), you should not have any problem. Probably worst case scenario (and I strongly doubt it), would be that you have 1-2" roll-up of your pad on the sides. Keep in mind, I do not own this...



Jim Robinson

Jim Robinson wrote an answer about on November 11, 2010

I don't know. The only person who could really know would be someone who has used both - and even that would not be conclusive. Every bag is unique, and every person is unique.

I had a very hard time finding comparable facts for the two bags, different manufacturers publish different specifications (like I could not find the foot box circumference for the Marmot (M), and I could only find the LONG specs for the North Face (NF). However, the NF seems to have 47oz of 800 FP down compared to 48oz of 800 FP down in the M (both longs). The 44oz mentioned earlier for the M was the regular. Someone mentioned the difference between European and American FP calculations. The European one uses a heaver compression piston, so their measurement is more conservative (750 FP European ~ 850 FP American). However, I could not determine if NF used one standard and M used the other. I DO know that Marmot has all their bags (except this one) tested in Europe for CN rating.

My bottom line review - based on my experience - is this: every North Face bag I've had (I've had 2-3), has seemed cold at or near it's rated temperature. I've tried a Marmot bag and I have a Mountain Hardwear bag. Both worked well (for me) at or even just below its rated temperature. I would buy a Marmot bag over a North Face bag any day of the week, all things being equal. However, to put it into better real-world perspective, I would buy the North Face Inferno over the Marmot if I could save at least $100. I do not need a -40F, I need a good -20F.

Hope this helps!

LOL - three years later and I have the Marmot -40. Unbelievable bag, though I have not used it yet. Think of this though... you can lie on top of it and the loft does not go down. And I'm not a light man... Expect an update after I try it out in northern NH!