An external urinary incontinence aid in the form of a pelvic floor support sling has three components. A belt or girdle encircles the patient at or above the waist. An X-shaped elastic cross strap has hook/loop fastener strips at its ends to attach removably to the outer surface of the girdle, and hook/loop material at the crossing or intersection. A pressure block or pad is attached removably to the crossing portion of the cross strap, and presses against the perineum or pelvic floor, applying pressure to occlude the urethra and prevent or reduce involuntary leakage.