The muvi anti mist tabs are desgined to stop your muvi hd or k series handsfree camera from developing mist whilst in the waterproof case in cold or humid conditions compatible with all muvi cameras using waterproof case muvi micro muvi hd muvi k series 12 mist absorbing re usable tabs perfect for wintersports watersports and humid countries ensure that your camera lens stays clear for perfect clarity can be reused up to 3x