Features: A 13.5 Gauge Open Coil Bonnell spring base. Product: Get this Luxury Tufted 'Balmoral' Memory Sprung Mattress today! Ideal: For promoting good blood circulation and contouring to your bodies natural shape. Perfect: For supporting your body, ensuring you a peaceful nights sleep. Size: Available in a single, small double, double and king. Additional: Dust-mite resistant and hypo-allergenic. | Luxury Tufted 'Balmoral' Memory Sprung Mattress | Wowcher