Last as long as want to! The Double Helix cock ring is all you need to go all night. The double ring style circles both the base of the penis and the scrotum for maximum endurance and support. It's easy to use, just fit the ends into eachother, and when you're done, they snap apart quickly with no fumbling necessary! Get ready for a marathon. Dildo sold separately.  Specifications Size - Fits most  Material - Plastic  Color - Black