Accell siRNA Delivery Media is a serum-free and antibiotic-free media designed for efficient delivery of Accell siRNA into difficult-to-transfect cells without the need for transfection reagents or complex delivery protocols. It contains a proprietary formulation of lipids, proteins and other components that enables passive uptake of siRNA for gene knockdown studies. This media is compatible with both suspension and adherent cell types. It simplifies siRNA delivery, reduces non-specific effects and toxicity and improves gene silencing efficiency.