You can sleep on the Endy Mattress immediately! Once you've unboxed your Endy Mattress and removed the plastic wrapping, in the span of a few seconds it will expand to its full size. If the mood strikes, hop on and take a nap right away! While the core of the mattress will take a couple of days to stabilize, using it right away won't cause any damage.
Your Endy Mattress will reach full firmness within about a week, and maintain perfect comfort for its lifetime. To fully adjust to your new mattress and break it in, we recommend giving your body about 2-3 weeks to get used to it!