This durable mattress design combines memory foam, reflex foam & a deep base of re-engineered ecofoam. This eco-friendly base material is 100% recycled & is highly supportive & durable. The memory foam layer on top balances this out, creating a comfortable & soothing place to sleep. The Eco Sleep Mattress is naturally hypoallergenic, dust mite-resistant & comes with a machine washable cover. Replacement covers are available to maintain the utmost in mattress hygiene without having to replace the entire mattress unnecessarily. In addition, the Eco Sleep is tested to BS7177 Medium Hazard Group 5, comes with a 5 year warranty.