Beautyrest Black Series Four Medium Pillow Top

The Beautyrest Black X-Class Medium Pillow Top is the flagship of Beautyrest's Black luxury line. The construction is the tallest in the lineup at 16 inches, with the highest coil count and the thickest BlackICE cooling foam Beautyrest builds — both meaningful upgrades over the K-Class one tier below. Verified ratings are excellent across the full performance slate.

At a 5/10 firmness with a substantial pillow top, the X-Class Medium is popular with side sleepers and luxury buyers who want a pillow-top hybrid feel with the cooling profile of an advanced phase-change cover system. Couples are a clear fit: excellent motion isolation and excellent edge support are both consistent with the higher coil count and individually wrapped construction. Heavy sleepers (in the average-to-plus range) benefit from the 16-inch deep structure and reinforced perimeter coils.

The BlackICE phase-change system is where the X-Class earns its luxury positioning. The cooling-to-the-touch quality of the cover is paired with a deeper cooling foam layer than any other Beautyrest model, which gives this mattress one of the strongest cooling profiles in the traditional pillow-top class. Hot sleepers who specifically prefer innerspring-feel over foam-only constructions have few stronger options at this price.

The limitations track the K-Class. The X-Class is , which means a 30-night trial — significantly shorter than the DTC norm and a real consideration at a $3,999 MSRP. The 10-year limited warranty is standard but trails lifetime coverage available in the DTC luxury space. The price itself reflects the construction (highest coil count, deepest BlackICE layer, 16-inch height), but it places this firmly in the premium tier. In-store evaluation is recommended before committing.