Sealy Mattress-in-a-Box NEW! Brentwood’s mattresses are also equipped with comfort foam and encased coils that provide support from the core of the mattress all the way to the edges (depending on the model). Costco has a fair selection of air mattresses as well. More airflow means you’ll be cooler. Online, Costco carries 20 mattress brands, and they may offer more in their stores. According to Beautyrest’s firmness scale, this mattress ranks as firm. If you don’t like it, then return it and go for a mattress from Costco. That means Costco has a lot of options for specialized beds, like adjustable frames and bases. Costco doesn’t only offer memory foam toppers. Finally, the bed comes with a secondary pump that helps maintain the appropriate firmness level throughout the night. at costco: $60 Instant Off Coupon* Sealy Posturepedic "Mira Loma" Queen Mattress [Item #168224] Online price $399.99 - Instant coupon $60 = Your cost $339.99 Offer valid 1/28/02 through 2/03/02 (plus shipping and handling) This mattress costs $599.99 for a queen. In addition to the support it provides, it is treated with antimicrobial agents to hinder the growth of microorganisms. shrls_str_117 = shrls_str_117+'