Sure thing

The silicone acts as a vacuum and it keeps your penis in place and grips it very firmly. It won't fall off unless you pull at with an unGodly force. I guess you can hang with these sleeves, but only up to 5 pounds or so. I wouldn't hang with it personally. I like it so far. My only problem with it is the suction cup will pinch every now and then. It may also form little air bubbles on the head of your dick. They go away within 5-10 minutes after you take it off and they don't hurt. I just put some baby powder down in the sleeve and it seems to help. The suction cup might not be necessary but it is attached to the eye hole.
--Inside the sleeve (
1st picture), there is a suction cup. Outside there is an eye hook where I feed a rubber band through (
2nd picture)
--Unroll the silicone sleeve until the suction cup is sticking it. Put the head of your penis in the suction cup. Then unroll the silicone down on your shaft (
3rd picture). You can keep it like this as sort of an anti-turtling device if you'd like.
--If you want to make it an ADS stretcher, just get a leg strap and attach it to your leg and feed the rubber band through (4th picture).