Gear you will need
Every time I have visited the cave, I have seen people who did not come
prepared. Unfortunately, if you don't have the right gear, it's nearly
impossible to explore the cave, and it is certainly not enjoyable.
The equipment you need for the cave you probably already have-
3 Sources of Light
The light sources can be anything from a propane lantern to an AA cell
flashlight- just make sure you have back ups- and extra fuel or batteries.
Standard 6 volt lanterns work really well.
Bring a sweatshirt and sweatpants- and some sturdy shoes. The shoes
are more essential in the upper cave, but even in the lower cave you should
have at least some hefty sneakers. Standard running shoes are adequate
for the lower cave, but some of the lava formations are sharp enough to
shred the material on them. Open-toed sandals and thongs are definitely
not a good idea- (even though I have seen people attempt it... wasn't
a pretty sight.)
Not essential, but nice to have:
A headlamp, so your hands are free
A hard hat or a bicycle helmet
Kneepads (I *will* have them next time...)
Disposable Camera with Flash