There are materials in the Contact RFI package from Polyurethane Foam, Nickel-Copper Polyester (NI/CU).A type of Fabric Over Foam is provided by the contacter RFI.The RFI EMI comes from the well-known 51K series.
4650AB51K04800 Features
Fabric Over Foam 51K series
4650AB51K04800 Applications
There are a lot of Laird Technologies EMI 4650AB51K04800 RFI and EMI Contacts applications.