The appearance of giants varied according to the type of giant (see true giants below) but they were generally humanoid in appearance, just much larger. Their bone structure was denser than that of humans, giving them extra toughness but slowing them down a little. Most giants had superior senses to most humans. In general, they could see and hear twice as well. The cloud giant, hill giant, and stone giant species had a particularly good sense of smell. Some had the capacity to see well in low light or total darkness as well. They were immune to almost all diseases and had a slight resistance to poison.