Beds

Mattress is a pad used on a bed.

Behind the scenes
The trailer to KQ9 shows many examples of mattresses many down in a dark cave (possibly the Dragon's Lair). They are resting on the ground, or being used in traps which cause a bed to slam down on intruders via chains. Graham is also shown to use one to escape down a river, surfing on the floating mattress. What the significance of all the mattresses is unknown. However, in fairy tales one particularly famous story is the Princess and the Pea, which had a princess who slept on dozens of mattresses, and could still feel a pea placed under the very bottom mattress.