K-FLEX ECO is a halogen-free, NBR-based closed cell, flexible elastomeric foam insulation. It is environmentally-friendly as it is free of CFCs, HFCs, HCFCs, PBDEs, formaldehyde and fibers. An EPA-registered antimicrobial agent is incorporated into the product providing additional protection against mold, fungal and bacterial growth. K-FLEX ECO does not contain carbon black or PVC in accordance with United States Navy Environmental Department standards.