【New & Unopened】 ★ A filter that prevents dust, pollen, exhaust fumes, and insects from entering your room by attaching it to outdoor vents. ★ Just stick it on! Adhesive sticker processing that can be attached and removed! Comes with tabs for secure attachment. ★ Approximately 21cm x approximately 21cm, 3 sheets per pack x 4 packs ★ Anti-allergen processed non-woven fabric ★ Made in Japan ■ The anti-allergen processed filter removes captured allergens. ■ The adhesive filter makes installation as easy as a sticker. ■ Perforations for easy cutting to fit the size of the vent. ■ Also prevents dust and dirt from entering the vent. ■ Features a replacement notification sign that appears when the filter is dirty. (May not appear depending on the airflow.) ※ The outer packaging may have some damage. Please understand this before purchasing.