Size: The straps on these packs are the same length as originals. Thus, if you are over 6' in height, or if you're a super size person, these may not be long enough.
Practicality: These are a terrible choice for a book bag, day pack, or really much aside from WWII re-enacting. Just about any other bag/ pack we carry is a better option.
How the hell does this thing go together? The Haversack is a rather unique design, one that I personally suspect was conceived by participants involved in early human trials of LSD.
Click on the link for a reprint of the
Army Field Manual: How to Pack the Haversack