The Slumber Express Smooth mattress is manufactured by Wolf Corporation. Wolf Corporation is the oldest mattress manufacturer in the United States under continuous family ownership! Made in the USA! Unbelievable value! Mattresses are compressed, rolled, boxed and shipped for ease in shipping and installation! The Comfort Plus Smooth is a no-flip mattress with a firm feel and smooth top construction. It features a 288-coil innerspring, sta-rite inner quilted fiber and a strong, non-woven gray fabric that is durable. Twin smooth top 1 sided roll able mattress.