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.
4548AB51K00035 Features
Fabric Over Foam 51K series
4548AB51K00035 Applications
There are a lot of Laird Technologies EMI 4548AB51K00035 RFI and EMI Contacts applications.