The cot base can be placed at two different heights. Your baby will sleep both safely and comfortably as the durable materials in the cot base have been tested to ensure they give their body the support it needs. The cot base is well ventilated for good air circulation which gives your child a pleasant sleeping climate. For your child's safety, use a cot and mattress of the same size. Complies with European standard EN 716-1. Do not leave anything in the cot or place the cot close to anything that could provide a foothold. It is important not to screw in hooks or handles onto the cot or place it near ropes, belts, curtains or anything else that can present a suffocation or strangulation hazard. Mattress and bedlinen are sold separately.