The use of 1,2-polybutadiene (1,2-PB) as a substitute for styrene-butadiene rubber (SBR) high styrene resin in conventional microcellular (M.C) sole compounds was studied. Effects of concentration of 1,2-PB filler combinations and concentration of blowing agent on technical properties of microcellular soled prepared from blends of natural rubber (NR) and 1,2-PB are discussed. Cell characteristics of seven selected vulcanizates were studied using a scanning electron microscope(SEM). It was found that blending of 1,2-PB with NR results in higher expansion, lightness, higher flex life and lower blooming in M.C soles. However, other technical properties are slightly inferior to those of M.C soled prepared using SBR-high styrene resin. A combination of china clay, precipitated silica and aluminium silicate in the ratio 60:30:15 is found to be an acceptable filler combination for NR/1,2-PB based M.C soles.