The instruments are not made from just any ice; he uses blocks from glaciers, some of which are centuries old. Isungset states that the ice's quality influences the sound produced by the ice instrument. A further challenge with ice instruments is their short lifespan, lasting only one or two performances before melting. To counteract this, his crew brings freezers to concerts, immediately storing instruments in deep freeze after use. 2 Isungset believes that nature dictates the music he creates during a performance. Terje mentioned his aim to increase public awareness of nature through his instruments and ice music.