This mattress has the same, smooth surface on both sides. You can easily turn it over if you like. The cover can be wiped off, but it cannot be removed.For safety reasons, it is important that there are no gaps between the mattress and the edges of the cot.Recommended for ages 0-3 years.We recommend IKEA fitted sheets for cots. They are dimensioned for our mattresses, which means the mattress retains its secure shape and size.The mattress is dimensioned for IKEA cots.