These shoe inserts are filled with natural, aromatic cedar which helps repel insects and keep boots, shoes and gear bags smelling naturally fresh, with its distinct fragrance. These absorbent shoe liners naturally eliminate odor, and do not contain chemicals, perfumes, or other artificial materials. Available in multiple sizes, these shoe fresheners are completely reusable; simply air dry as needed and replace after 6 months for maximum effectiveness. DO NOT put in washer or dryer. Keep away from heat or flame. Sold in sets of 2.