For use with UrAssist Personal Urine Management System The UrAssist collection bag has been designed to provide you freedom all day. Specifically designed for UrAssist, this large capacity collection bag holds almost a full days worth of urine prior to draining. To ensure UrAssist operates correctly, we recommend you change your Collection Bag twice per month to avoid bacteria and odor build up. Graduated fill lines are easily visible to monitor approximate output volume. Capacity of approximately 37 fluid ounces, enough for a full day. High quality drain tube stores neatly and one touch drain clip provides easy one hand draining (bag drains in approximately 15-30 sec). Proprietary venting system helps to contain odors while on the go or at the bedside. This proprietary venting system gently allows air to escape the collection bag while keeping odors contained. Designed to last up to two weeks with daily use