Sweet PDZ Stall Freshener Horse stall refresher is made of an all-natural, non-toxic and non-hazardous granular mineral. Contains no masking scents or perfumes. Absorbs moisture and neutralizes ammonia and odors through action exchange (a unique neutralizing process associated with Clinoptilolite Zeolite, Sweet PDZ's main ingredient). Safe and superior alternative to hydrated lime and barn lime. Extends bedding life, reduces fly population, environmentally "green".