A sit harness consists of a waist belt and two leg loops which are normally connected in the front of the hips through a permanent webbing loop called a "belay loop". Belay loops are extremely strong, but nonetheless still a single point of failure that caused at least one notorious death. For rock climbing, the rope typically goes through the two "tie-in loops" that are above and below the "belay loop". The figure-eight knot is mostly used for rock climbing. These are the most commonly used harnesses for recreational activities such as abseiling and rock climbing, as they afford a wide range of movement while still maintaining a high level of safety. Ensuring the harness fits correctly is key to avoiding pain in the upper thigh area caused by the leg loops being too tight around the upper legs and groin area, while at the same time ensuring that a climber flipped over in a fall does not slip out. The waist belt should be tightened snugly. Leg loops should not be particularly tight, but for obvious reasons neither should they have enough slack to allow extraneous parts of a male climber to get caught inside them.