I'm looking for some packing underwear because my harness isn't good for long term wear. I can't afford a rodeo or one of those expensive ones. Does anyone know of any good alternatives? I hear theres mens briefs that have a "penis pocket/pouch" in them that work well.

A jockstrap is what has worked best for me so far. I got the cheap papi 3 pack and it's been wonderful, I have never had my packet so secure before. And looking at it you might not think it'd work but it does.

This simple design right here has changed my life lol

http://www.ftmguide.org/images/simpleharness.pdf

seriously, it's awesome. I just used two shoestrings and my packers stay 100% secure. I frequently go commando in jeans (it's just comfortable to me) and if I pack I'll use this and have no worry of a mishap. Stays perfectly placed. I use the mr limpy xsma or small depending on what I'm wearing. The packer hangs naturally and sits in a more anatomical position. But if you combine this harness you can wear whatever underwear you please, be it boxers, briefs, or none.

Jockstraps are great, and MUCH cheaper than the packing underwear.

--Jay

Honestly, I'm about a 28 waist and when I needed to keep a packer in place I just wore really small boys underwear. Like a size medium. They still stretched enough to fit me without hurting and kept things in place

Light jockstrap, just like the others said.