1. Natural rubber without any other smell. 2. Massage function Introduction: ... compression foot massage with every step you take!Your rubber tipped sandals stimulate tiny nerve endings in your soles ... time. Serenity of the spirit starts at the sole.Raw material: Natural rubber, without any peculiar smellSize: M 7, W ... M4, W5, M 8, W 9Color: Brown, Black Natural Rubber sandles, Ameircan hotsale products