Features: Whiteleaf- made out of activated carbon Mainly absorbs the toxic fumes, due to emission from synthetic inside and outer air In addition, removes odor of cigarette smoke,pet, food spills, sweat and damp And works for 4 months The uniqueness of white leaf: Unique due to proprietary process Resources are of natural and renewable Because packed with compressed wooden particleboard Lastly covered in virgin kraft paper board Benefits of white leaf: Keep your car, free from odor Get rid of headache, allergy, and discomfort Works 24 x 7, no need for power The elegant design suits the car interior No harm for pets and human Costs less works for 4 months Won't let odor mix with scent, so suits scent user too Safe and comfortable for driving