Bought this and never got to use it before our baby outgrew it. “This on the go mattress is made for travel! The SkyBaby is a fully washable mattress that creates a bed space on the plane that can work with or without the infant belt and comes with its own bag. With most airlines, babies under 2 years of age don't generally get their own seat on an aero plane. Sky Baby is a compact pillow and mattress, and is useful in helping them to be more comfortable on your knee. It is designed to work with the airline infant belt, or can be used without it. Being lightweight and compact, it fits nicely into hand luggage, or the bag provided allows Sky Baby to be clipped externally to something else, e.g. the nappy bag. Sky Baby is fully washable and passes BS EN ISO: 12952: Part 1. Sky Baby is 56cm long (the width of the average airline seat) and 29 cm wide, and can be used from birth. Sky Baby can be used for babies of differing ages, depending on the size of your child and whether they will be happy to take a nap on your knee.”