Surety Mosquito Repellent Patch works in all types of conditions - sleeping, playing, indoors, outdoors etc. Just stick one patch on the cloth and the sticker remains effective for 12 hours, keeping you safe from mosquito bites. The patch is effective, natural and safe for everyone, including children. It is DEET free with no harsh insecticides or pesticides, and is safe for your entire family.Also recommended for holidays, barbecues, camping, hiking, cycling, fishing, gardening and other outdoor activities.