Figure eights can be used in a number of ways, depending on how you tie them in with the rope. The illustration shows one way of doing it. Available now as Camalots, TCU's, Quads, Aliens, Big Dudes, etc. A technique of wedging a hand in a crack in order to use it as a hold. It is used to orient and protect a climber.
Some harnesses have loops for securing other equipment, like carabiners.
A bag designed to carry climbing gear, provisions and equipment. Also referred to as a pig . Can be worn with or without a headlamp for night or cave climbing. When searching for a climbing helmet, you want to consider weight, comfort, fit and ventilation. It's a good idea to try on a climbing helmet both with and without a hat, since you may wish to use it both ways, depending on circumstances.