WindWizard
Solar Enthusiast
That is exactly what I thought when I purchased a flexible dryer hose. I put a match to it and it burst into flames. I replaced my dryer vent with a solid metal dryer vent because I did not want my house to go up in flames.They are made out of thin aluminum.
I suggest the OP test a piece of the vent hose with a lighter to check for flammability.