Big Red Says
M-1 Helmet Body "Weight Limit"
Helmet weight is largely determined by the final gauge or thickness of the metal.
M-1 Liner Suspension System "Weight Limit"
Liner weight is largely determined by the weight of the component parts of the suspension assembly.
M-1 Liner Suspension System “Snap-In Head Band IV”
Snap-in head band with full wrap leather sweatband
M-1 Liner Suspension System “Snap-In Head Band III”
Does size really matter?
Well, when it comes to non-adjustable head bands..... yes.
M-1 Liner Suspension System “Snap-In Head Band II”
The earliest version of the head band used in M-1 liner suspension systems was manufactured in non-adjustable fixed sizes.