> 1663

Helmet (Bicycle fine.. or some other really cool looking one.)

Gloves (spiky rock)

Knee pads (hard ones)

Lightweight overalls with pockets (can be dusty musty)

Laser pointer (Green one would be cool)

Lots and lots of light (spot led?) - hands free good.

(Headcam - low light)

Magnetic Compass

Cave Map

Hands free Radio

(While walking consciously check what things look and what look like backwards)