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don't limit yourself to "Disc Golf" straps. I thought paying $40 for straps was ridiculous, and I had this set of golf clubs that I haven't used in years, so I took the quad straps off of my ball golf bag. They're more comfortable then any other straps i've tried.
I have a pair of Phenix Quad Straps and they work fine. I switched over to the Revolution Dual Pack and like it much better though.
I have been using the same military "H" harness strap for the last 10 years. They cost about $12 and are more durable than anything out there.