Description: Features: Quick Spit Anti-fog Spray prevents clouding of dive masks, swim goggles, paintball masks, sports goggles, safety goggles, binoculars, and so much more. Long lasting, non-toxic formula Natural and biodegradable For use on glass or plastic Specifications: Size(approx.): Dia: 2cm/0.79in, Height: 9.3cm/3.66in Capacity: 20ML It is a empty bottle. There is a sponge containing curing Anti-Fog Spray in the bottle, and Add water in the bottle when using. Instructions: 1-2 drops on goggles 2-3 drops for mask Using fingers to rub on glass uniformly Water is applied to hydrophilic dispersion of the agent Rub on glass and let it dry before or after using. It will have anti fog function. Specifications: Defogger Solid State Defog Package Included: 1*Anti Fog Agent