Ideal for bunk beds, this comfortable and environmentally conscious mattress is constructed with a medium firmness spring core to provide evenly distributed support for growing bones and muscles. The spring is topped with a high-density insulator pad to prevent spring feel and breathable Smart Fibre comfort layers, for durability and comfort. As well as offering substantial support for growing bones and muscles, the comfort layers we use in our children’s mattresses are engineered from recycled plastic bottles and sustainable fibres, diverting them from going into landfill. Unlike foam, the unique structure of Smart Fibre enables the free flow of air through the mattress, actively reducing moisture build up. This helps to regulate body temperature and maintain an ambient sleeping environment. Jay-Be® Smart Fibre is also free from VOC’s and harmful chemicals. For even more cosiness, this Jay-Be® children\'s mattress is finished in a durable and soft woven fabric. All Jay-Be® Simply Kids mattresses are backed by a five-year manufacturer\'s guarantee. Roll-packed for your complete convenience. Key Features Foam Free comfort layers and free from harmful chemicals Breathable Smart Fibre comfort layers for a drier, fresher mattress Sprung interior for evenly distributed posture support Hypoallergenic for a healthier sleeping environment Soft woven fabric sleeping surface for increased durability and extra comfort Easy care - simply rotate regularly to maximise the life of the mattress Edge to Edge comfort layers for a max sleeping area UK Made to British and European safety standards Dimensions Mattress packed: W33 x L33 x H100cm Mattress ready to use: W90 x L190 x D16cm Product weight: 11.3kg / 24.9lb