You can, of course, use other sheets, but the BABYBJÖRN Fitted Sheet for Travel Crib Light is specially designed to fit the travel cot. It is fitted to the dimensions of the mattress and this ensures that the sheet lies flat and does not slide around. The elastic edges also make it easier when making the bed. The sheet has been certified according to Oeko-Tex® Standard 100, Class 1, meaning that it is guaranteed to be free from health-hazardous substances. The hypoallergenic fabric is safe for your child’s sensitive skin.