Sleep Joy 3" ViscO2 Green Tea Memory Foam Mattress Topper, Twin XL 3-inch ViscO2 memory foam mattress topper with 3-zone ventilation for twin XL mattress; comfortable addition to dormitory bed Made of 3-pound density, open-cell memory foam with plant-based ingredients; natural green tea additive for fresh, mint odor Forms to body's contours for better alignment and pressure-point relief; minimizes motion transfer Spot clean only 100% Polyurethane