This twin mattress uses Swiss Sanitized AG's triple-action technology, which inhibits the growth of bacteria and mold. It ensures a superior level of protection, with a bacterial inhibition rate of 99% or higher, a mold prevention rate of 99% or higher, and a dust mite repellency rate of 95% or higher. By combining Tencel, Sanitized, and gel memory foam, our mattresses effectively ward off bacteria, dust mites, mold, and yellowing. They also regulate temperature, enhance heat dissipation, and improve breathability, moisture-wicking, and skin-friendliness, creating an ideal environment for peaceful sleep. We will expertly compress the mattress into a single box. And 1-Bonus Memory Foam Pillow is included with the Twin Size Mattress and Full Size Mattress. After the mattress is opened, please wait patiently for 72 hours to fully expand the mattress, and it is recommended not to use it during this period.