Meet the iKey AK-39: a rugged wearable keyboard designed to meet MIL-461 standards. It is designed for use in harsh EMI environments and is 100% humidity resistant. The AK-39 does not take a lot of space, so it does not get in the way of the wearer. The keyboard features a FSR pointing device with left and right click functionality.
The AK-39 keyboard features adjustable green LED backlighting. The snap-on faceplate eliminates accidental key strokes. Windows and Mac operating systems are supported. More information is available here.