Although there are many types of moisture absorber out there, I found thesis to work extremely well. You have nice camera equipment (camera, housing, strobe, video light, etc.) That all can trap moisture and severely damage your electronic equipment - even overnight. I like these moisture munchers as They are made of hard plastic with clear the ends open to air circulation. The material inside will absorb any moisture in your electronic device and keep it dry, even for long periods of time. If you own at underwater camera, thesis inexpensive moisture munchers are critical to own. Simply place one in your device after you are done using it or When You Are Going to place it in storage. The Munchers willChange color when it is No Longer useful. There is just no reason to risk damaging your valuable equipment When thesis inexpensive and useful Munchers can be used.