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MRE's are real weight food and Mountian house are dehydrated making them much lighter. but then I guess you have to add the weight of a stove to that. Mountian house for me but Im testing some MRE;s this summer
MRE's are really bulky. Like Pathfinder said, they need to be field stripped, but still they are more bulky, and weigh more than MH. The weight of your stove and pot, are not going to be as much as the added weight of MREs, unless you are only going for a night or two.