Sprung mattress: Get a memory fibre open coil sprung mattress. Construction: With an open coil spring system and a layer of next generation memory fibre. Hypo allergenic: Features a hypoallergenic and anti-dust mite filling. Supportive: Provides fantastic anatomical support to your neck, shoulders, back and hips. Cover: A micro quilted, cool touch cover with a crisp white micro quilted border. Size: Choose from five sizes (see pricing below).