Harmony® Polyisoprene Non-Latex Dams are used as a barrier when engaging in oral/vaginal and oral/anal sex to help reduce the transmission of bodily fluids, harmful pathogens & sexually transmitted infections (STIs).Harmony® Polyisoprene Dams are a 6x10 inch lightly scented polyisoprene sheet. Each Harmony® Polyisoprene Dam is individually wrapped in a protective sleeve and Ziploc package.