Because, believe me, it will make the experience MUCH more enjoyable. You are almost guarunteed to bash your head multiple times while caving, which will make you d*** glad you have a helmet on. It will save your knees too, especially going through tight squeezes. Light sources are possibly the most important thing to have though. If you turn all the lights off while you are in a cave, you will be able to feel your hand against your nose, but you won't be able to see it.
ADDED: Indeed, though with experience you bash your head far less frequently!
I'd add to the above proper caving clothing, or perhaps more accurately, clothes appropriate to the particular cave, and this often means one-piece suits designed as caving wear.
Knee-pads yes - many cavers also wear somewhat similar elbow-pads; again depending on the nature of the cave you are visiting.
Safety gear is extremely important. If your working on something dangerous and you don't have on safety gear you will most likely get hurt or possibly killed.
Considering a crash even at 5 mph on a motorcycle can kill you, safety gear is a necessity. Safety gear is to protect you from collisions and scraping.
make sure you have on protective gear
Shooting glasses and hearing protection are the most important.
what re the characteristics of good safety gear
To protect you.
Personally, I always leave my vehicle in gear when parking, as an added safety precaution- should the handrake fail whilst it's parked, the engaged gear acts as an extra brake. 1st gear is best, or (if pointing downhill) reverse- but ALWAYS remember that you've left the vehicle in gear before you set off again!!
Both. A small driving gear and a large driven gear is a force multiplier. Whilst a large driving gear and a small driven gear is a speed multiplier
Purchasing quality athletic gear is important for your safety. Quality gear is well put together, usually more comfortable and better fitting than lesser quality gear. It allows the athlete to perform at the highest standard possible.
All gear is important.
Health and safety laws are very important to protect individuals and families. Some precautions include wearing gloves, goggles, hard hats and other protective gear.
Gear knobs are mainly used to change gears whilst driving, which is normally done using the clutch pedal and pressing down to the floor whilst changing gears using the knob.