* Medium/firm kids mattress* Bonnel open coil springs* Breathable EcoComfort Fibres™* Waterproof side* HypoallergenicA brilliant double-sided mattress made for when accidents happen.Designed with a waterproof, easy-to-wipe clean surface on one side for protection when little accidents happen. Simply turn this double-sided mattress over to the sumptuous, soft surface when your little one no longer needs waterproof assurance. Supported by medium-firm Bonnel open-coil springs offering great support, even as your child grows. Designed to keep them cool with highly breathable EcoComfort Fibres™ for a refreshing night's sleep. Its enhanced breathability promotes free flow of air to help regulate your little one’s body temperature throughout the night, keeping them cool for a fresher, comfortable night’s sleep. Create the cleanest, safest and freshest sleeping environment for your child with a hypoallergenic, foam and FR chemical treatment-free bed.