Features and Benefits:Air Activated; Disposable; All Natural; Odorless; Adhesive Backing to keep warmer in place; includes 16 warmers for 8 pairsMr. Heater disposable toe warmers are made of all natural ingredients that create heat when exposed to the air. The odorless pouch fits in the toe of your boots or shoes. The adhesive on the bottom helps keep them from shifting as you work or play in the cold. Light weight and with a low profile, they are a comfortable addition to your footwear. Experience the warmth and comfort only Mr. Heater can provide!