This Grey Rock A Bye Baby Glider Cradle with Locking Casters and Mattress gently glides with a side-to-side motion to soothe your newborn just like a lullaby. Great for bedside sleeper but can be utilized in any room as the 4 hooded casters make for easy movement and lock for added safety. Gently glide newborn to sleep then stop the motion whenever needed. A portable delight! Great as a bedside sleeper, you can also move the cradle to any room and always have your child near, especially in the early months, thanks to the 4 hooded casters. Caster locks ensure added safety. Mattress Included.