Moisture can destroy the finest cameras in the world. Not water mind you, but just the dampness of the diving environment. You can't see it, but it's there, and it can cause damage to your equipment unknowingly at an extremely high cost to you. Your underwater photography equipment is a big investment. A Silica Desiccant Pack Absorbs Moisture. Silica Desiccant Packs are a very useful item to have for any camera housing. Whether you are diving in a mild climate or the tropics, desiccant packs absorb unwanted moisture in your cameras housing. So protect your investment from unwanted moisture. Packs are a great Save-A-Dive Kit item. Always carry some spares so you will always have Fresh Dry Absorbent Silica Packs on hand.