Sienna 4ft6 Cooler MattressOne of the most advanced mattresses offering some of the most recent in sleep technology made up of 13 layers of high quality materials. The Sienna Mattress features an excellent level of support from the 2mm x 150mm pocket Springs at it's core. This mattress features two different fabric upholstery options on either side; a 'Fresh' side for the Autumn and Winter months and a 'Cooler' side which will allow you to fall into a deep cool sleep in the