Designed for Sam’s Club, Night Therapy’s Memory Foam 10″ Pressure Relief Mattress and BiFold Box Spring Set by Zinus delivers conforming comfort and pressure relief at an affordable price. Memory Foam. Mattresses When it comes to choosing a mattress, one of the first decisions you’ll want to make is which material you prefer. Memory foam is an extremely popular choice, and Sam’s Club® has plenty of high-quality memory foam mattresses to choose from. Experience the revolutionary fusion of memory foam layered with innovative hydra luxe gel technology. It’s the perfect marriage of comfort and coolness. Get membership and renewal discounts with Sam’s Club coupons and promotions for January 2019 on RetailMeNot. Today’s top Sam’s Club offer: $2 Cash Back For Online Purchases of $25 Sitewide. What Mattress is Most Popular? We researched many different brands from the big names to new upstarts. While we focused on the most popular mattress types, innerspring and memory foam, our guide showcases the best and worst that the mattress industry offers. .