The Purpose of the BLUE SKY SHEET 　　=Considerate driving for our blue sky.= ● Contributes to the reduction of black-smoke & bad smell from diesel engine. ● Contributes to CO2 reduction, due to improved mileage. The material used in the BLUE SKY SHEET is the same as that in used woolen sweaters. We developed a new material with great potential for the environment using recycled clothes. We consider that recycling is an important issue in the 21st century. Now's the time for recycling things rather than throwing them away after use. We will appreciate it if the BLUE SKY SHEET becomes a good representative of this. We will keep researching into the BLUE SKY SHEET and expect to be able to the BLUE SKY SHEET to provide soil nutrients after its in-car use has finished. + Recycled clothes Carbon 　　 　　　　　　　　　　　　　　　 　　　　　 　　　　　　　　 　 The BLUE SKY SHEET 　　　　　　　　　　　　　　　　　　 　　　　　　　　　　 The BLUE SKY SHEET fits into the air filter box.