Beautyrest Black K-Class Medium Pillow Top

The Beautyrest Black K-Class Medium Pillow Top is the mid-tier of the Beautyrest Black luxury line, sitting between the C-Class and X-Class. The construction stacks a thicker BlackICE cooling foam layout over a denser pocketed coil count than the C-Class, finished in a pillow-top quilted ticking. Verified ratings show excellent across cooling, motion isolation, pressure relief, edge support, and durability — the full slate.

At a 5/10 firmness, the K-Class Medium is preferred by side sleepers seeking strong pressure relief without losing the structured feel of an innerspring-derived hybrid. Couples are another core fit: the excellent motion-isolation rating is consistent with the higher coil count and individually wrapped coil design, and the excellent edge support means neither partner feels they're sleeping on a cliff.

The BlackICE cooling system is the most-discussed feature in the independent review space. The phase-change material in the cover, combined with the open-channel coil base, gives this mattress a measurable cooling-to-the-touch quality that is uncommon in the pillow-top class. Hot sleepers who prefer a traditional innerspring feel over an all-foam or grid construction tend to find this one of the better-performing options.

The trade-offs are structural. The K-Class is , which means no direct DTC channel and — importantly — a much shorter 30-night trial than the 100–365 nights common in the DTC space. The 10-year limited warranty is standard for the category. The $2,599 MSRP places it in the premium tier, and the absence of a long trial period is a real consideration if you're not confident the medium pillow-top feel will suit you. Try it in-store before committing.