Cloth Modifiers Mass Setting.

Hi everyone,

I’ve been working with blenders cloth system quite extensively over the last few months but there is one piece of information that eludes me. Does anyone happen to know what the cloths Mass setting ( material section of the physics tab ) is measured in? Its near impossible to set the right mass for a cloth object without knowing this, other than by eye ( which I always like to avoid where possible ). Thanks in advance.

Joel