Silicone is the material. PIAA was the starter/most popular, SilBlade is a cheaper option. My PIAAs lasted me 10 years on first set. Got inserts and they are like 7ish years old now. Plus the silicone coats your windshield and give you a light RainXish coating. Procedure is alcohol clean the windshield, put the wipers on, turn on wipers dry for 4-10 minutes to bed in/coat the windshield, then you are good.