About this item Keep Baby Safe & Comfy: The besrey bassinets bedside sleeper is constructed of aviation-grade aluminum and steel-alloy for durability, which is fully compliant with ASTM, CPSIA, and CCPSA standards, keeping your baby safe and promoting bedside parent-infant bonding with your little one Spine Protective Mattress: A spacious shape memory mattress made of skin-friendly 3D vertical cotton is designed for infants from 1-5 months up to 19.8 lbs. It’s 2.5 cm thick, as recommended by experts, to provide all-around support and protection for your baby’s spine. 7 Adjustable Heights: bassinet bedside sleeper can be adjusted to 7 different heights from 27.56″ to 32.28″, which is measured from floor to top of bassinets. It’s suitable for varying bed heights. In addition, retractable feet of 3.93″ allow for use with all beds including box beds. All-around Breathable Mesh: The bedside bassinet is designed with all-round breathable mesh to maximize air circulation and expand field of vision, so that your baby will always sleep comfortably. And mesh pocket on the side of bedside bassinet for baby bottles, tissues and other baby supplies. Easy Move & Portability: The baby bedside bassinet features 360-degree wheels with brakes, making it extremely easy to move around home and safely fixing in position with brakes. Providing your baby with a familiar sleep environment wherever you go. How to Use the Bedside Sleeper Mode: 1. Adjust the crib to a right height 2. Secure the crib to the adult bed with securing straps 3. Press the brakes to lock the wheels 【Dimensions】Bedside Bassinet: 36”L x 22.5”W x 33”H IN, Sleeping Area: 35.5”L x 20.5”W x 15”H IN, Mattress: 31.89″L x 18.89″W x 1″ H IN.