NYDA Express Double Pack is a physical treatment for head lice and nits that works through dimethicone oils. This family value pack contains two 50ml bottles and effectively eliminates lice, nymphs, and eggs in a single 10-minute application, requiring no repeat treatment. The product works through a physical mechanism using silicone oils that block the breathing system of lice and nits. It is suitable for all ages, including infants and pregnant/breastfeeding women. The treatment should be stored below 25°C and kept away from heat sources and naked flames due to flammable ingredients. For external use only, avoid contact with eyes and mucous membranes. The formula is well-tolerated and does not carry increased risk of allergic reactions.