Mine is 9.6kg, about 22lbs (I weighed it). Based on the recent thread where I described its contents I think I will add 1l of water, which (in the wonderful metric system) weighs another 1kg (2.2lbs)

I have not tried walking with it, but I will (sometime soon) walk to a friend's house on the other side of town about 5.5km (about 3.5 miles) just to see what it's like.

I suppose the weight issue comes down to your fitness/ability to carry a certain amount, and how far you anticipate carrying it:

Is it from the house to the car?
Is it from the house to a rescue helicopter?
Is it from the house to a log cabin 600m up a mountain 25km away?

A