I purchased a clamp a few weeks into my recovery from RALP, mostly for those moments not being protected with a pad, like after a shower, or wearing swim trunks. I did not like wearing it for the long term because of the very nature of it. If it restricts urine, it restricts blood too. And I desperately want my entire penis to have blood flow. I got my urologist to prescribe a condom catheter as an alternative and I use them regularly. You need to figure out the correct size, with the help of the supplier, and now I use one daily to catch my stress incontinence ( 1-2 ounces typically) when I work out. At first, I attached it to the catheter bag that came with the shipment. Now I just put a paper clamp on the end of it and drain the collected urine at intervals into a toilet or urinal during my workout. I have figured out ways to keep the clamp from irritating my leg or scrotum as I am sure you can too. The restriction on blood flow is nonexistent and I can work out without fear of leakage or worrying about a thicker pad shifting around on me. Luckily, I am far enough along in my recovery that the rest of my day I get by with just a light pad in my underwear.