I've been trying to optimize my recovery with each surgery I get and one major struggle for me has been dealing with the SP catheter and the bag. The leg bag doesn't work for me (too small and fills up too fast and it slides down) so I did some research and found this pair of underwear on Amazon. They work amazingly well and hold either a leg bag or 2000ml day bag. Keep all the tubing secure and you can wear normal clothes over top without visible hoses. So much more comfortable- it's been a total gamechanger. Cost me less that $10 per pair. I got the "womens" version because it was less than 1/3 of the price of the "mens" version. They are essentially identical. In the end I ordered a pair of each.
I showed them to my surgeon today and he plans to share the knowledge with future patients.
Highly recommend getting a couple pairs for post-op! I wear crappy boxer briefs under them to catch any wound drainage so I don't get the pocket underwear nasty- then I can wear them two days in a row before washing.