We have obtained an expression for the restitution coefficient e for both millimetric and submillimetric as a function of Ũ , θ, and ∆ cos θ in the two limits Ũ ≪ 1 and Ũ ≫ 1, which we verified rigorously over a wide range of experimental conditions. The results of our work can help inform future design of superhydrophobic surfaces to optimize its water repellency.