GYROBALLS is a soft stretchy blubbery outer-hourglass-curving ballstretcher with eight super-stretch ribs for max stretch in a taller ballstretcherthe ribs keep the squeeze down so it feels like grippy tugging the length of your sack. Based on the all-time best ballstretcher SQUEEZE, this one is a bit taller, a bit wider, for medium to larger nutsacks. The SQUEEZE based design has more grip in the middle and less at the nut/sack openings...all with a rubbery fat lip for longer comfort. GYROBALLS is lighter than other larger ballstretchers for longer stretch-time. Made of our custom Plus+SILICONE mix with a lush dull velvet finish and a warm fleshy feel perfect for your sack. Hnkyjunk makes the good gear betterwe design for your pleasure