Many hotels dress up their mattresses with toppers, clean and silky sheets, and fluffy pillows. Hotels may replace their mattresses more often than the average bed, ensuring that guests are always resting on a mattress still in its prime. There may also be a psychological component to why you sleep well on a hotel mattress. Many of us associate hotels with vacations and taking it easy. When your mind is set on relaxing, you’re probably more likely to find a mattress comfortable. If you don’t sleep well in a hotel, it might be because of the “first night effect.” Many of us need time to adjust to a new sleep environment before we rest well.