This mattress features a 13.5 gauge open coil spring unit for reliable support, combined with hypoallergenic fillings for a healthier, more comfortable sleep. With a 21cm depth and double-sided design, it offers both durability and flexibility. The water-resistant Nautilus cover adds an extra layer of protection, while the mattress is certified to Contract Source 5 (BS7177), meeting high safety and quality standards for both residential and commercial use.