Gently blows small dust particles off your valuable DSLR sensor and optical equipment. Safer than using compressed air or liquid propellants. A built-in check valve helps prevent particles from re-entering the blower while the flat base allows the blower to stand upright, keeping the nozzle clean. The soft blower tip provides further protection. Silicone materials are less likely to degrade over time, compared to rubber. There are no consumable supplies to replace and is environmentally friendly.