I'm 70 and tried the HydraMax penis pump with great success. To extend the blood flow engorgement of my penis after using the pump, I put on one of these Titemen cock rings, which come in four sizes. I ordered the clear and it was nearly invisible while wearing it. After 30 minutes I removed it by grasping to the two tabs and gently slid it off my fully swollen member. I noticed over the next 15 minutes that my penis was leaking copious amounts of pre-seminal fluid, which I believe was brought on by the combination of the penis pump and 30-minute session with the cock ring. I highly recommend these Titeman cock rings.
These are very comfortable and more than one size fits with smaller rings being tighter. Can be used by themselves or in combination with other items.
TitanMen Tools Soft and Stretch Cock Ring Set 4 Pack for Men
First time trying cock ring. Good variety of sizes to try different pressures
Soft and stretchy helps keep me tight and hard