Easy to use: you could add the essential oils on the felt hanging sheet and put it in a packing bag, and each felt hanging sheet is designed with a hole, then you could thread the elastic rope through the hole in the sheet and tie it on somewhere you like of your car Quality material: the blank sheets are made of quality felt material, safe and non-, no bad smell, easy to wash and dry quickly, not easy to deform and break, can accompany you for long time What you receive: you get 100 pieces sublimation air freshener sheets and 100 pieces packaging bags with a roll of the rope, the large quantity and sensible combination satisfy your daily use and replacement needs Funny DIY process: the car scented sheets are white on both sides and suitable for dye sublimation or heat transfer applications, which can absorb dye well and not melt in the heat transfer process, they are Perfect to DIY various kinds of patterns according to your favor