Protect the HALO Bassinest twin sleeper mattresses with these custom designed mattress pads from HALO. These mattress pads features a unique shape to perfectly fit the HALO Bassinest twin sleeper mattresses. Mattress pads have an envelope design to ensure a secure fit that wont become loose with use. Plus, theyre quilted, with three layers of 100% polyester material that create a waterproof barrier that will help protect the mattresses from leaks and odors.