The right size ring insane amount of stretch long - wearing and rubbery — use them as a single for a quickie JO ring or stack ‘em up layered-style for marathon play… plus you get five strong stretchy soft rings -- always ready for a wank or fuck with your tube of JACKER’S.JACKER’s will stack up for gradual ballstretch play. Add more when you want more stretch — steady gradual stretch for slow gains that feel right.