Quote Originally Posted by SadieKate
I think she means a Mule with a capital M. It is a model of hydration pack from, I think, Camelback. It is one of the larger models.

Editing - yes. From Camelback, 540 cu in of capacity and 100 oz bladder.
Yes that is what I mean. Not the animal. lol. And what i am going to carry in it will probably be small stuff. Like my camera firstaid kit a small book deck of cards. not super heavy stuff