Our 4 year old grandson was visiting for 3 weeks and we needed an extra bed. We used a regular twin size sheet on it and it worked just fine. Ok when he jumped on it the sheets slipped a bit. It was inflated for over 3 full weeks and never needed to be refilled. The only con was that you must have some other device to inflate it-so that was an added cost otherwise it would have been a five star review. He wanted blue and we got yellow so we had to add the sheet in blue.