Equipment

Helmet: A helmet equipped with a chin strap and mounted with your primary source of light is essential.

Lights: Bring at least 3 sources of light with spare bulbs and batteries. The entire trip should be able to be done with any one of these lights.
Clothing: Wear warm clothes, such as synthetic fleece for insulation. One-piece coveralls add an extra layer for warmth over your other clothes.

Footwear: Sturdy boots will help support your feet over rough cave floors and keep you feet warm. Consider waterproof if water is anticipated.

Gloves: Will protect your hands and provide warmth, even cheap leather work gloves will help make your trip more comfortable than none.

First Aid Kit: A personal size for each person, and a main kit to be left near entrance on short trips, or carried for longer trips.

Food: Carry high-energy food sufficient for the length of the trip. It is wise to carry some extra in case the trip takes longer than expected. Caving trips are hard on everything so pack durable foods. Bananas and sandwiches get crushed during a trip but bagels and power bars usually do fine.

Other Equipment: Put everything into a sturdy pack. Many cavers use military surplus packs, etc. for durability and low cost. Containers for hydration and equipment are available. Any clothing that goes on a cave trip is likely to be soiled and torn beyond normal day-to-day use. Carry a large trash bag in your pack. It can be used for emergency warmth or carrying dirty cave clothes home.