SHIPS IN A BOX AND ARRIVES COMPRESSED: Your memory foam mattress is compressed, rolled, and shipped in a box right to your doorstep; mattress will expand more quickly in a warm room, but please allow 24-48 hours for mattress for full expansion MEDIUM FIRM FEEL: This Lucid mattress includes 1 in of ventilated memory foam infused with gel and bamboo charcoal and 5 ins of supportive base foam for a medium firm feel ideal for stomach and back sleepers and perfect for teens and growing children BAMBOO CHARCOAL AND GEL INFUSIONS: This comfortable memory foam mattress is infused with cooling gel to help you sleep cooler and bamboo charcoal to help capture odors to keep your bed fresh all day every day LOW PROFILE DESIGN: This all-foam mattress has layers that contour to your shape and help align the spine for pressure relieving comfort with a versatile height that fits well in RVs, trundle beds, or bunk beds, and works with most any bed frame RELIABLE AND QUALITY COMFORT: CertiPUR-US Certified to meet quality standards, this mattress has a 10-year limited warranty and can be relied on to provide comfort for all your loved ones through every stage of life