 The slide angle is another dynamic measure of hydrophobicity and is measured by depositing a droplet on a surface and tilting the surface until the droplet begins to slide.Liquids in the Cassie-Baxter state generally exhibit lower slide angles and contact angle hysteresis than those in the Wenzel state.A simple model can be used to predict the effectiveness of a manmade micro- or nano-fabricated surface for its conditional state (wenzel or cassie-baxter), contact angle and contact angle hysteresis.