It depends on the type of float and where they were manufactured. The best material......and the most expensive.......is kevlar coated with polyurethane. Modern spinny wing things like S92 and EH101 use this material.
Older materials such as s61 tend to be nylon/polyurethane or nylon/rubber and are less resistant than the modern ones.
If your purchasing department get their spares from a PMA shop in the outback of mexico then you had better take off with a drybag and a flask of soup.