Myelin water fraction (MWF) imaging is an important tool to investigate demyelination in WM. When using GRE sequences, the method suffers from T2* effects, leading to a non-exponential behaviour. This can potentially influence the calculation of MWF. At low fields susceptibility effects are less and the assumption of biexponential T2-decay is more accurate. Here, the feasibility of MWF at 0.55 T, using biexponential fitting was demonstrated.