The best tone saving solution. Tone Saver is made of high modulus carbon fiber and with absolutely good vacuum airtight effects, displaying a professional image. It preserves your flute in an air-sealed and waterproof environment with the control of constant temperature and humidity under negative pressure. It effectively restrains oxidation of your musical instrument and assures the tone for professional performance. The product life of your musical instrument is thus extended. The tone saver fits perfectly in all living and exhibition surroundings and provides full protection of your musical instrument.