Product review (5 stars): MUCH SAFER THAN VINYL ....
Replacing a old vinyl hose with this quality flexible metal hose.  A BIG PLUS..... it comes with the connector that attaches to the output vent of the dryer.  This is vinyl but heavy enough that heat could not ignite it.  Anything that improves the safety of the redone late 1800's house its updating is definitely a plus.