Given a sheaf$F$ of sets over a topological space$X$, the section over an arbitrary (= not necessarily open) subset $V\subset X$ is a continuous section of the corresponding etale space restricted to $V$.

The local extension of germs to the open neighborhoods of points by paracompactness gives rise to an extension of the section to an open neighborhood of the whole set $V$. Therefore every flabby sheaf is soft, because flabbiness gives the extension from open subsets. Fine sheaves are always soft.