Waterproof protection This outdoor window air conditioner cover features a waterproof layer to shield your unit from rain, snow, and severe weather, helping to extend its life and maintain performance. Insulating design An internal insulating layer minimizes heat loss during cold months, preserves a comfortable indoor climate, and supports lower energy costs. Heatresistant reflective material Constructed with a reflective surface that deflects sunlight, this cover helps prevent overheating and reduces sunrelated wear, contributing to a longerlasting unit. Multiple size options Available in four sizes to fit a range of window air conditioning units: 43x33x30 cm, 53x38x5 cm, 65x45.5x52 cm, 70x47x57 cm. Use scenarios Protect an outdoor window A/C in rainy or snowy climates to prevent moisture damage. Use during winter to insulate the unit and improve energy efficiency, keeping indoor temperatures stable. Situate in sunny, hot locations to reduce heat buildup and prolong the life of the air conditioner.