HOME SETUP TIMER
When should I first check a compressed mattress for full expansion?
Quick answer
Use 24 hours as the starting point.
After unboxing
Start a reminder timer
24 hours
Timer has not started.
When it rings: Inspect height, edges and corners at the first check.
What the source actually says
Purple identifies 24 hours as the early end of the common 24-to-72-hour expansion range.
More time may be needed; do not assume a defect at this first check.
Source
Read the manufacturer guidance. Model instructions override this general page.