The Silentnight Healthy Growth Imagine Sprung Bunk Mattress is specifically designed for use with bunk beds, cabin beds, and mid/high sleepers, making it perfect for multi-child families. The medium-firm-feel mattress includes a Bonnell spring support system for improved weight distribution and correct spinal alignment. Allergy UK has approved this mattress for its anti-allergen protection, and the mattress uses no harsh chemicals or foam. Patented EcoComfort Fibres� provide a breathable mattress that helps regulate your child�s temperature throughout the night.Designed for kids from age 3+ up to late teens, the Silentnight Healthy Growth Imagine Sprung Bunk Mattress is specifically engineered to be compatible with bunk beds, cabin beds, and mid/high sleepers. Fitted with open coil spring technology and EcoComfort Fibres� for unbeatable breathability, the mattress promotes good hygiene, spinal posture, and allergy protection. The mattress is available in single, small double and double sizes for every home, so you can continue using a mattress you trust as your child progresses through all their important milestones. Made in the UK.Fitted with Bonnell spring support technology, the mattress provides full-body support for a comfortable night�s sleep that also promotes correct posture and spinal alignment. The zoned spring system is scientifically proven by UCLan studies to aid with development. The open coil system allows uninterrupted airflow, making the mattress breathable and helping to keep it feeling cool and fresh.Created from 100% recycled plastic bottles for a more environmentally friendly option, the Silentnight patented EcoComfort Fibre� technology also makes the mattress extremely breathable, promoting good airflow and freshness. The temperature control feature means that your child can sleep comfortably all night long without overheating.The Imagine Sprung Kids Mattress has been approved by Allergy UK for its superior allergen protection technology, so you can be sure your child is well protected from dust mites and irritants. This mattress is also made using natural and sustainable materials, making it both environmentally friendly and free from harsh chemicals, unnecessarily bulky foam, and harmful fabrics for a cleaner, odourless sleeping environment.