Features:
440 Yards (400 meters).
Ranging capability for most hunting situations.
6x magnification for a close and clear view.
+1- yard accuracy for a more precise distance measurement.
Water resistant construction for more durable use in poor weather conditions.
Includes lens cover, lanyard and case.

These are often called bullet proof vests. They come in various sizes, colors, and designs including ones worn under the clothes of Wall Street tycoons. They are manufactured by many companies around the world.
You can find these on different sites like eBay when soldiers come home from Iraq or Afghanistan they often sell theirs.