Walmart offers the Slumber 1 8" Twin Mattress-in-a-Box for $99 with free shipping. That's tied with our mention from two weeks ago and the lowest total price we could find by $26. Each tight-top mattress is constructed to adjust to body size and weight and features individual spring coils, green tea odor protectant, and active charcoal for moisture absorption.

Walmart also offers the Slumber 1 8" Full Mattress-in-a-Box for $129 with free shipping. That's tied with our mention from two weeks ago and the lowest total price we could find by $36.