Core Firmness

Soft:

Two layers of strong 100% cotton strapping core
Belt has a "broken-in" feel
Thickness is about 3.5 mm
Embroidery features such as metallic thread and logos work well with this construction

Stiff:

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
Embroidery features such as metallic thread and logos are not conducive with this construction