Murphy’s Naturals Mosquito Repellent Incense Sticks are made with all natural plant based ingredients and are entirely DEET free. These repellent incense sticks are bamboo infused with rosemary, peppermint, citronella, and cedar wood. The high concentration of these repellent essential oils is what makes this product so effective! There are twelve repellent incense sticks per tube, and each stick burns up to 2-2. 5 hours. ENJOY LIFE OUTDOORS by using these repellent incense sticks while dining on your patio, camping, and more! Pro tip for repelling mosquitos: we recommend placing a Murphy’s Naturals Mosquito Repellent Incense Stick close to your location and expand your area of coverage by placing repellent incense sticks 12 feet apart in a perimeter around your deck or patio.