Made Of Plastic And Silicone Material Adheres To Back Of Your Phone With Strong Adhesive Perfect For Carrying Identification, Room Key, Cash Or Credit Card Fun Stress Reliever Press Bubbles Down To Relieve Stress Make Your Own Pattern By Pressing On Different Bubbles Or Just Press For Fun Encourages Focus And Self-Soothing For Users With Anxiety, Attention Disorders And More Perfect For Reducing Stress And Boredom