TRI-SPORT is OXBALLS` take on traditional metal tri-cockrings. Best of all. it`s made from our signature FLEXtpr so there`s no need to worry about trying to wrestle your junk into uncomfortable. rigid rings. TRI-SPORT`s super-soft material and unique 3-ring sling design grips your meat for a harder. longer lasting erection and creates a bigger. more pronounced bulge. Each ring is a different size so it can be rotated and worn to best fit you.