Comfortable Memory Foam that grips the back of your instrument and secures with a fine, clear band.  Will not fall off, easily fits into your case, very lightweight, too!  Ergonomically contoured foam is comfortable and allows freedom of playing.  The PSR Original has a steep slope that helps the musician keep the instrument from drooping over the chest. 

Fits 1/2 to full size violins and 12-15 violas.