The Bubba Blue Air+ Cot Liner is the first and the best of its kind. Its slimline design uses an air permeable 3D spacer mesh & a bamboo cotton mesh to form a taut protective liner around the inside perimeter of the cot.Unlike padded cot bumpers, the Bubba Blue Air+ Cot Liner allows optimal air to flow through the liner's mesh. It will keep your little one's limbs and pacifiers safely inside the cot without the risk of restricted airflow. Its lightweight, air permeable mesh helps reduce overheating.All sides facing inside the cot is made from bamboo cotton mesh; so it's soft & smooth for baby to touch!