Condom Catheters: How and When to Use Condom catheters are external urinary catheters that are worn like a condom. They collect urine as it drains out of your bladder and send it to a collection bag strapped to your leg. What are the benefits of a condom catheter? Condom catheters have several benefits over internal catheters. For example, they: are less likely to cause a catheter-associated urinary tract infection (CAUTI) are more comfortable cause less movement restriction