Todd,
The weight is a bit lighter than the heavier camo wool, and way stronger. I've also got a Lemhi in the hemp and use it for mtn. lion hunting cuz I can break down my bow and have my arrow tube strapped on...sometimes we're out there a while.
If and when I get another it will be of hemp, hands down my favorite material for a pack.
I'm not sure if Ang has any more hemp but it is extremely easy to find online and you'll need about a yard and a half of fabric so don't be afraid to supply your own material. A lot of times the distributor will send out free samples. The only problem is I can't remember the weight/yard. It might be around a 15 oz. Also you may want to dye the material before a pack is made because the hemp I received was very pale in color. I hope this helps, feel free to call me at 406.544.5208