IS Clinical SPF 20 Powder Sunscreen in Translucent. IS Clinical SPF 20 Powder Sunscreen is a power packed product that shields skin from both UVA and UVB rays. Designed to be easily applied over your daily make-up application, IS Clinical SPF 20 Powder Sunscreen is both convenient and effective to use. With each use skin will be perfectly protected and have a perfect finish! IS Clinical SPF 20 Powder Sunscreen is appropriate for use on all skin types and can be used along with your daily make-up application. To Use: Using a large make-up brush or soft applicator, gently apply a thin layer of IS Clinical SPF 20 Powder Sunscreen over top of your daily make-up application. Product can be applied as needed.