The foam for your bed has been vacuum sealed for efficient shipping. To ensure your foam is the correct size and shape, at least 20 minutes of expansion time is recommended. Gently shake the pad(s) before placing them on your mattress. The pad(s) will recover to full-size on their own overnight.
Any odor you may smell is non-toxic and will fade over time. To minimize the smell, allow the air chamber to air out before zipping the cover. If the odor persists, try laying dryer sheets on top of the air chamber.