Elemental Horizon pack volumes

I have a medium kalais and it just swallows all my gear. Granted I made the switch from a jam 50 to it and it still has room left over for me. It certainly seems to be a little bit like a Mary poppins bag in the sense that it fits much more than I would have expected. Not really sure if this helps. It certainly holds more than my jam 35 for what its worth.
Just send him an email voicing you questions and concerns. Ive always had great interactions with Matt. Get the aluminum v-stay. Well worth the weight IMHO.
Thanks,
James

When I was researching packs before I bought my Kalais I noted that the volume of the extension collar was not included in the total volume figure for the pack. So, it will hold more than one would think based on the stated 47 liter capacity. Still, using a Kalais with a full sized bear canister (eg BV-500) is an exercise in packing. I, too, have a medium size (in forest green) and It will handle the big bear can vertically but it's a tight squeeze and consumes some of your extension collar space as well.
By all means get the V-stay, it makes the pack more comfortable even with lighter loads.

I own and love my size small Kalais pack but I don’t own a bear canister so unfortunately I cant help you there but here is a review with a 2 1/2 gallon bucket being put inside to simulate one here .

The SGT Rock review is very informative; thanks!

Anna, since you have the size small, can you tell me how long the extension collar on your Kalais is? I can't find any photos to give me a good sense of how much extra space the collar provides.

my extension collar is 11 inches high and 17 1/2 wide.