Short answer: 2–4 hours to reach full height after unpacking — a specific, disclosed expansion window worth understanding before your first night.
Why this timeline is distinct from the separate breaking-in period
Expansion (2-4 hours) and breaking-in (3-7 nights) are two genuinely different processes — physical foam expansion happens first, adjustment to the firmness happens over the following nights.
Why unpacking timing matters practically
Unpack your pillow several hours before bedtime, ideally in the morning, so it has fully expanded by the time you're ready to sleep on it.
💡 Worth knowing: a faint chemical scent is common when first unsealing, clearing after roughly 10 hours in a ventilated room — worth planning your unboxing location accordingly.
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