COIL-IN-COIL SPRINGS AND INNERSPRINGS

A mattress innerspring comprising a plurality of interconnected coil-in-coil springs, each coil-in-coil spring having an outside helical coil (10) and an inside helical coil (20) which is connected to the outside helical coil, the outside helical coil having an upper end convolution (30) and a lower end convolution opposite the upper end convolution, an uncompressed height of approximately 8.25 inches and a 4 or more helical convolutions, the inside helical coil having an upper end convolution and a lower end convolution opposite the upper end convolution, an uncompressed height of approximately 5.75 inches and 6 or more helical convolutions, wherein a diameter of the upper end convolution of the outside helical coil is approximately 64 mm and a diameter of the previous convolutions of the outside helical coil is approximately 70 mm, wherein a diameter of the lower end convolution of the inside helical coil is approximately 40.8 mm and a diameter of other convolutions of the inside helical coil is approximately 32.8 mm, and wherein a wire gauge of the coils is in an approximate range of between 14 and 15.5 and each coil is double-annealed, arranged in a matrix and laced together with helical lacing wire.