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 | Provides Tactile Stimulation | Encourages Focus And Self-Soothing For Users With Anxiety, Attention Disorders And More | Perfect For Reducing Stress And Boredom