This twin bassinet has mesh sides and walls to offer maximum airflow (and visibility) and allow your twins to sleep closely, while providing a safe, separate sleep space for each baby. The slim base with wheels easily slides under your bed, sofa or chair. There are 5 adjustable heights and large storage pockets provide space for burp clothes, small toys or pacifiers. The bassinet includes a 1" Thick Mattress with removable sheets. JPMA certified to meet or exceed all safety standards set by the CPSC & ASTM. This bassinet is recommended for babies 0-5 months and should not be used if your your infant is beginning to push up on their hands and knees. Assembled dimensions: 30"L x 30"W x 32.5"H-38.25"H