Wooden beds are first recorded in the First Dynasty but their basic form changed little over time; most beds had a rectangular frame that was jointed at the corners. As with chairs, the bed legs were often shaped like those of bulls or lions, perhaps chosen for their association with strength. This type of leg also appears on the golden beds of Tutankhamun.Matting and leather were used to upholster the bed, which would probably have been quite comfortable. Headrests were used instead of pillows, perhaps because they were more comfortable in hot weather. Some of the coarsely woven linen rectangles found among tomb furniture, and also used to wrap mummies, may have been used as blankets. Wool was not used for making textiles as it was regarded as ritually impure.A bed was often included in the tombs of the well to do, often with the coffin placed on top of it. It is shown in this position in Ankhwahibre's Book of the Dead, bathed in the revitalizing light of the sun. The Egyptians thought of death as a transitory stage, like sleep, between life on earth and the Afterlife.