Yes, airflow through the base of a mattress can improve its comfort and longevity. When a mattress is placed on a solid surface like a piece of plywood or a bunkie board, moisture and heat can become trapped in the mattress’s bottom. Airflow helps absorbed body heat and moisture droplets escape, preventing the warm and damp conditions that allow mold to grow. Air may still flow through the sides and top of the mattress to let the bed breathe, but for full protection, a slatted surface is best.