1. The material is qualitative soft, elastic, transparent strong strength. 2. The use of natural plant essential oil volatilization to flight from mosquitoes. 3. The use of polymer synthesis technology essential oil molecules bound on the carrier, in order to delay the volatilization of essential oils. And sending out the aroma of uniform, lasting, penetrating. The purpose of achieve sustained, long-term drive midge. Article 4. Every can use 90 days, long-term drive midge.