Instead of safety glasses that are shaped like regular glasses, these shields attach to a hardhat. The protective lens can be lowered or raised under the brim of the hat. Because they are attached to the hat, they won't slide down your nose or irritate your ears, the designer says, and they're also less likely to fall off or to be misplaced.

The glasses are made to fit slotted MSA and Bullard 4100 and 3000 hardhats. The kit comes with four pairs of custom hinges, two internal hinges, and two hinge caps. The manufacturer, Worldwide Vision Technologies of Denville, N.J., offers a warranty covering workmanship and material for 12 months from the date of purchase. For details, visit