The Cooling Topper is a mattress topper designed to add a cooler, more pressure-relieving comfort layer to an existing mattress. It is useful for sleepers who want to soften a too-firm mattress, improve surface cushioning, or add temperature-responsive comfort without replacing the full bed. Construction and materials Foam topper construction featuring copper- and graphene-infused Energex™ Temperature Responsive Foam designed for pressure relief, responsive comfort, and cooler sleep. Copper and graphene help disperse body warmth through the foam, while its breathable, open-cell structure supports airflow. A luxury cooling fabric cover adds another cooling-focused layer to the sleep surface. Designed to sit above the mattress and below the fitted sheet or mattress protector. Adds 2 inches of extra height to the sleep surface. Fit and sizing Choose the topper size that matches the mattress size. Use fitted sheets and mattress protectors that can accommodate the combined mattress and topper height. Works best on a mattress that is still structurally supportive but needs more surface comfort. Setup and care notes Unbox and allow the topper to expand if shipped compressed. Place directly on top of the mattress before adding a protector or fitted sheet. Keep foam dry and protected from spills. Follow the care label for any removable cover. Shipping, trial, and warranty details Current shipping, return, exchange, and warranty terms should be confirmed on the live product page and Nest Bedding policy pages. Best uses Softening a mattress that feels too firm. Adding pressure relief to an existing bed. Hot sleepers who want a cooler comfort surface. Guest beds, primary beds, and temporary comfort adjustments.