Walking and Climbing

Yes the photon hoody comparison is a bit baffling   Differences I've been able to locate: the photon hoody is ~20 pounds cheaper and now (as per RABs website) uses PL Sport not 1. 

The kindly super technical folk on BPL.com give Primaloft Sport as .74 clo/oz vs 0.84 for One. So the generator should be a bit warmer. It certainly looked a little thicker comparing them in the Climbers shop last weekend.

I like the generators endurance lined stuff pocket - should mean you can put it in it in the outside pocket of a rucksack without worrying too much about it getting wet.

The hood really is a full scale hide from the cruel world style thing....

Sorry - shorthand for backpackinglight.com. Go to the forums and search for clo value or maybe r value.

I think because they're into trying to make everything as light as possible (including insulation) they tend to get really quite scientific at times.

There's also one person on the forum who did a bunch of posts trying to explain the science behind stuff like the clo / r value and posting a bunch of data about how various clothes measured using a heat pad to test them etc. Slightly scary perhaps but pretty informative too

I tried one on last week. But already have a relatively new photon hoody,

I'd more likely get the Belayjacket  if I felt I would need that level of protection/warmth.  The 'softer' photon is more versatile for my needs as I use it for supplementing my sleeping bag or quilt.

I guess it's more an equivalent jacket to an ME Fitzroy really. 

"There's also one person on the forum who did a bunch of posts trying to explain the science behind stuff like the clo / r value and posting a bunch of data about how various clothes measured using a heat pad to test them etc. Slightly scary perhaps"

< hmm, wonder if CP goes on there from time to time, sounds like him! >