Core Firmness

Soft:

Available for all belt widths
Available for only cotton belts
Two layers of strong 100% cotton strapping core
Belt has a "broken-in" feel
Thickness is about 3.5 mm

Stiff:

Available for only 1.75 inch and 2 inch wide belts
Two layers of strong 100% cotton, high density strapping core
Belt has a more rigid feel and is a bit less pliable
Thickness is about 5.0 mm