Silicone Foley catheters are designed to provide reliable and comfortable urinary drainage for acute and long-term care. The 100% Silicone Foley catheters can be retained in the human body for up to 90 days. The standard 2-way catheters (sizes 12 to 18) can also be used for replacement of suprapubic catheters for drainage of the bladder (exchange only).