Allswell 4” Memory Foam Mattress Topper Infused with Cooling Diamond Gel, King

Indulge in an instant comfort upgrade—no new mattress required. The Allswell 4" Cooling Diamond  Support Memory Foam Mattress Topper is designed for sleepers who want cooler nights, better pressure relief, and more restorative sleep. If your mattress feels too firm or leaves you waking up sore, this topper provides an instant upgrade. A thick layer of supportive memory foam reduces pressure at the shoulders, hips, and back, helping your body relax so you can fall asleep faster and wake up feeling more refreshed. For hot sleepers, Cooling Diamond Technology helps manage heat by drawing warmth away from your body, reducing heat buildup that can interrupt sleep. This helps keep the sleep surface feeling cooler and more comfortable throughout the night. Two sides. Endless comfort. This reversible topper adapts to you—not the other way around. Sleep cooler with breathable airflow and added support on one side, or turn it over for a luxuriously plush, cool‑to‑the‑touch sleep surface with diamond‑infused memory foam. As your comfort needs change, a simple flip delivers your perfect night’s sleep. Setup is easy—just unbox, unroll, and place on your mattress. From the first night, enjoy a bed that feels cooler, more supportive, and noticeably more comfortable.