Will it smell when I unbox it?

Any new-mattress odor is mild and short-lived. Off-gassing clears in 12 to 24 hours, far shorter than the multi-day stretch common to imported boxed beds. The foams are CertiPUR-US certified to strict low-VOC limits, and the mattress is made in Ontario and ships within days rather than sitting compressed for months. Since it arrives rolled, unbox it in a ventilated room and give it a day to expand fully.