Mattress: Get a Cool Blue memory foam sprung mattress. Benefits: Memory Foam mattresses support the head and relax the neck muscles, correct alignment of the spine, reduce the risk of swollen hip joints, and prevent circulatory problems. Features: 13.5 gauge bonnell spring and a wired edge for extra support. Suitable For: Will fit any type of standard bed base. Options: Choose your size - 2ft 6 (small single), 3ft (single), 4ft (small double), 4ft 6 (double), 5ft (king), and 6ft (superking). Cool Blue Memory Foam Sprung Mattress | Small | Living Social