ConvaTec 2D NATURA UROSTOMY BAG 45 MM, TRANSPARENT, STANDARD, 10 PCSThe bag 2D NATURA URO transparent 45 mm is part of the ostomy system, which is designed to collect urine. The NATURA two part system consists of two parts a mat and a bag. The advantages of the two part system are that the pad can stay on your body for up to 3 days and you only change the bag. The skin around the stoma is therefore less stressed. All types of washers can be combined with all types of bags of the two piece system, provided that they