What is an s-blend? An s-blend is a combination of two consonants (and sometimes three), the first of which is an /s/, followed by a different consonant sound such as k, l, n, p, t, m, w, etc,. Why do speech therapists care about s-blends? Consonant clusters are frequent targets in speech therapy. Why? Because consonant clusters, also known as blends, require significant coordination and timing to produce correctly and are therefore difficult for many children. When children