Williams Shaving Foam for Sensitive Skin provides protection and freshness, while taking care of your skin from the aggressions that occur during shaving. Contains the Williams APS system (Advanced Protection System) that protects against irritation and cuts during shaving. Williams Shaving Foam for Sensitive Skin provides protection and freshness, while taking care of your skin from the aggressions that occur during shaving. Contains the Williams APS system (Advanced Protection System) that protects against irritation and cuts during shaving. Shake well before use. Hold the bottle and press on the hand until foam is obtained. Apply directly to damp face until a rich, creamy lather is obtained.