How long will it take for my mattress to fully expand?

After removing all the plastic, we recommend allowing your mattress to breathe for 3–5 hours before putting on any sheets or mattress protectors. While you can safely sleep on it the first night, please note that it can take up to 72 hours for the mattress to fully expand and for most wrinkles to smooth out. Rest assured, using the mattress right away won’t harm it in any way!