It is made of high quality silicone. It is non-toxic, durable and flexible;. It will help you to reduce the noise, keep bugs off, block dust, mice, lizards, leaves, and feathers from outside and save energy bill. Installation is tool- free, fast and easy. A small thing to solve the big problem! Three layer design reduces sound up to five times. It will keep Bugs Off, usually bugs climb through the crack under the door. With this door bottom seal you will say bye-bye to the bugs. Energy Saving - It takes long time to cool down in summer when air conditioner in use, as cold air leak through the crack under the door. This seals will block the cold air in summer and hot air during winter and it will help you to reduce electric cost. Easy Installation- Fast and easy installation within 2 minutes. No need of any specialized tool. This model can seal gap of 0 to 25 mm. Box contains: 1 x Door Bottom Seal 1 x User Guide