The Polymed Urine Collection Bag with Bottom Outlet is meant to be used for short and long term urine collection - The urine bag has a soft and kink resistant PVC tubing - The urine collection bag comes with a non-return valve to stop the back flow of urine Urine bags are available either as a leg bag or a drainage bag. A Leg urine bag is attached to the patients thigh with elastic or Velcro straps and allows them to move freely during the day. They have a small holding capacity in comparison to a drainage urine bag and need to be emptied and cleaned more frequently. A drainage urine bag is used for patients that may be in wheelchairs or beds and are not attached to the patients body. They can be used for a longer period of time and are commonly used during the night while the patient is asleep.