Ever Bamboo Boot Deodorizer Bag Set w/ Natural Bamboo Charcoal ALL NATURAL DEODORIZER - Bamboo charcoal is a naturally occurring, sustainable porous structure with millions of microscopic holes pulling and absorbing odour and moisture from the air. SCENT CONTROL - Due to non-toxic and eco-friendly attributes, the Boot Deodorizer Set is completely unscented and eliminates odors instead of masking them. INSTRUCTIONS - When not being worn, simply place a deodorizer into each boot for best effect. Your friends and family will thank you. LASTS UP TO 1 YEAR - Reactivate your bamboo charcoal under sunlight 2-3 hours per side every 30-60 days.