the distance 27 allows the pillow to fit into the neck region of the user 39 s body and also caters for the density ranges in the density ratings the slope of surface 1a causes the manipulative block 2 to have its desired effect the height of wall 21 allows for comfort but does not nullify the effect of block 2 the embodiment illustrated is constructed of polyurethane foam having the following densities density ratings used are as per australian standard 2281 1979 density of section a is n 28 100 density of block 1 is n 20 40 the pillow has the following dimensions in the uncompressed state angle 23 is approximately 115 degrees angle 20 is approximately 35 degrees the slope 28 is the same as the slope 29 distance cd is approximately 97 millimeters distance df is approximately 52 millimeters distance fg is approximately 20 millimeters distance fe is approxiatmely 52 millimeters distance km is approximately 68 millimeters distance cm is approximately 370 millimeters the width of the pillow distance xy diagram 2 is approximately 450 millimeters the preferred distance range in each case is u00b1 5 mm and the preferred angle range u00b1 5 u00b0 by compressing the pillow in the critical region region above block 2 a resultant reactionary force is created due to the density differences between.