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3D3DThyroid shield.
This is a lead-impregnated cloth shield, designed to be worn around the neck to protect the radiation-sensitive thyroid gland from damage when x-rays need to be taken of this general area of the body, but the thyroid itself doesn't need to be visible.
It's quite heavy, because inside is a layer containing a high percentage of lead in some sort of resin material (my percentage below is just a guess).
Source: eBay seller vbb71
Contributor: Theodore Gray
Acquired: 11 March, 2007
Text Updated: 12 March, 2007
Price: $23
Size: 8"
Purity: 10%
Sample Group: Medical