This is stretchy, very soft and spongy. I would wear it every day of my life if it didn't make my bulge too obvious. It puts a spongy, bouncy feeling in my crotch which nature didn't put there. Feels wonderful, safe and protective. It's like having foam implanted in your scrotum. I'm in heaven!
Fun for jacking. When your hand hits against your balls, it absorbs the shock, bounces and feels good!
For me it seems totally safe to wear all day long. It stays in place for me. It gives a very gentle padding pushing my stuff forward creating a significant bulge in my pants. I would even risk wearing it for wrestling because it absorbs impact. But the bulge it would put in my singlet would sexually arouse all the men and women seeing me.