Mainstays 6" Innerspring Mattress, Twin Crafted to perfectly fit in your guest rooms, dorm rooms, trundle beds, and bunk beds and any other compact space A plush, gel-infused top layer provides pressure relief and ensures refreshing sleep experience Compatible with platform frames or a traditional box spring High quality CertiPUR-US® certified foam is wrapped in an OEKO-TEX® certified cover, ensuring a safe sleep environment Suitable for all age groups; optimal support for lightweight sleepers Available in Twin, Twin XL, and Full configurations Please allow 24–72 hours for the mattress to fully expand after unboxing