The Chicco bed barrier lets you move your child into a tradition side-less bed. A great way for preventing your child from falling out of bed, the barrier easily attaches under the mattress. The Barrier is not intended for use with children under 18 months or over 5 years of age. Make sure that, when the Barrier is in place and secured, there is a space of at least 25cm (10 in) between each bed rail and the corresponding end of the Barrier. The Barrier is not for use with adults, infirm, elderly or non-domestic environments. The use of the barrier is allowed with mattresses having: Length 190-250cm / Minimum width 90cm / Maximum height 20cm. Do not use the barrier with mattresses thicker than 20cm. Before use, we invite you to carefully read the labels, warnings and instructions indicated on the product packaging.