Flute Gels - Comfort for Your Flute! Flute Gels are made of a soft gel that keeps your hands in the correct position and provides a more comfortable playing experience. Installs in seconds to any flute, Flute Gels are long-lasting and easy to keep clean. Each pack contains 2 gels: one for the left index finger and one for the right thumb. This will make your flute easier to hold and more comfortable.