Highgrove Twin Comfort Mattress - 6ft Super King Size Zip and Link; Featuring a unique winter-summer construction, the Twin Comfort is designed to provide the perfect sleeping temperature all year round. Its cosy winter side is upholstered in a soft to touch stretch knit fabric, while its summer side features a durable Belgian damask fabric. Its winter side boasts a 50mm layer of temperature sensitive memory foam thats designed to soften when in contact with body heat. Moulding itself to your contours, memory foam reduces pressure points, resulting in less tossing and turning by evenly distributing your body weight. The interior is made up of robust open coil springs, set out in rows from head to toe with each row attached by a spiral helical wire. To further strengthen the finished unit, a thick rod-edge wire is fitted around the perimeter springs to reinforce the mattress border. To enhance the mattress lifespan, we recommend that you rotate it and flip it over regularly and for complete peace of mind, it comes with a 5-year warranty.