An electrical connector has a flexible boot to create a flexible, sealed interface. A connector body has a plurality of pin receivers positioned within a tubular sleeve. The flexible boot is received in the connector body and includes a tubular body of elastically flexible material. The tubular body has a body diameter dimensionally controlled to provide an interference fit when received in the tubular sleeve. A boot flexible sleeve is positioned outward of the tubular body. A boot joining wall homogenously joins the tubular body to the flexible sleeve. A flange extends from a free end of the flexible sleeve defining a circular ring oriented transverse to and encircling the flexible sleeve. A boot ring fixes the flange to a panel. The connector body is thereafter elastically displaceable with respect to the panel when the tubular body deflects with respect to the flexible sleeve and the flange.