It's likely Tuvokium, similar to vulcanized rubberDaveinOlyWA wrote:They are made of a material that reminds me of Tyvek. This is VERY strong, lightweight and used in houses to provide a good one way moisture barrier to allow the house to breathe but remains waterproof. It is quite the remarkable stuff.
I suggest you try the washable foam type of universal forced air HVAC filter. You can cut it to fit, and they are designed for high air flow.LeafTaxi wrote:Has anyone tried making a high-flow cabin filter out of other materials? We are now hitting temps where I can avoid running A/C if I run the fan full-tilt. But it sounds like the fan is working hard for the amount of air coming out of the vents.