Ultralight camping packs

I wonder where the new K4X could fit in here with 2lbs of weight savings over the K4? I know it isn't UL but it wont be necessarily heavy anymore either. It looks to be less than 4lbs most likely.
 
I wonder where the new K4X could fit in here with 2lbs of weight savings over the K4? I know it isn't UL but it wont be necessarily heavy anymore either. It looks to be less than 4lbs most likely.
Yea it’s one of the reasons I’ve been holding off buying a pack. If it’s 4lbs and has the range mentioned it’s hard to beat. Steve Spec is my type salesman. No pushy just tells you what makes it good without all the annoying fluff.
 
Yea it’s one of the reasons I’ve been holding off buying a pack. If it’s 4lbs and has the range mentioned it’s hard to beat. Steve Spec is my type salesman. No pushy just tells you what makes it good without all the annoying fluff.
I've used my K4 for backpacking in for 14ers, so I am looking forward to the option to shave a little weight for some trips like that and maybe even future trips such as the Colorado Trail. I also plan on utilizing the K4X in the Mammoth Challenge.
 
I would wager it’s going to be fantastic. I’m going to try and grab one as soon as they come out. I am very fond of my K4.
 
I think superior wilderness designs currently has the best hip belt, suspension, and internal frame design (in their long haul, wolverine, and big wild packs) in the <2.5# pack category.

I haven't used the new 'ultra' laminated uhmwpe fabrics, my current pack is the seek outside flight one in spectragrid. My buddy and I each got one to take on an off trail trek in the sierras. Mine survived great. My buddy surfed/slide down an avalanche shoot full of loose scree and wore a small hole in the bottom of his near the frame. The grid reinforcement worked and the hole didn't grow the rest of the trip. Another member of the group had a ula and no problems. I would expect durability out of these uhmwpe fabrics similar to 500d/1000d codura depending on weight, but in lab testing according to the taber test these new 'ultra' brand fabrics are supposedly way better.
 
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