Experience the ultimate comfort with the SLEEPROTEX Mattress - X-38 Graphene Ultra-Silent Spring Mattress (Height 5.5"). Crafted with advanced Graphene fibers, this mattress is antimicrobial, dust mite-resistant, UV-resistant, and static-free. Featuring Ultra-Silent Chain Springs for comprehensive spinal support and a 20mm thick high-density foam layer. Compliant with UK fire safety standards, Hong Kong safety regulations, and ISO9001 certified. Choose between 5.5" or 8.5" thickness, backed by a 10-year warranty and 180-day trial(Applicable to Hong Kong only). Elevate your sleep quality, enhance blood circulation, and boost immune and respiratory functions with this exclusive mattress.