The 4moms rockaRoo and mamaRoo Infant Insert, Cool Mesh Fabric, Modern Design smooth nest-knit fabric with breathable 3D air mesh provides enhanced breathability and airflow to keep baby cool and comfortable. The updated design features fresh and modern colors. The lightweight, mesh newborn insert also provides added comfort and support for your newborn. It fits perfectly with the 4moms mamaRoo, 4moms rockaRoo, and 4moms bounceRoo infant seats and is machine-washable.