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.
4238AA51K00920 Features
Fabric Over Foam 51K series
4238AA51K00920 Applications
There are a lot of Laird Technologies EMI 4238AA51K00920 RFI and EMI Contacts applications.