CORE ballstretcher best feature is the outer ribs for super long springy-stretch: it stays taller on your sack with more padded grip in the middle for a fatty bag-squeeze.Based on our most popular SQUEEZE ballstretcher, CORE fits your nuts with a smooth hourglass inner sleeve on your nutbag... this slick tunnel wraps your sack with a medium firm squeeze while the outer ribs keep you stretched down for real low-hangers.HOW TO WEAR: a little lube or spit, gym sweaty showering is good, stretch CORE and drop your bag through and adjust where you want it, the inner hourglass shape will hold where you put it.Made of our extra-soft Plus+SILICONE blend, it'll keep the grip firm enough with a smooth velvety rubbery comfortable stretch, and the right slippery grip for more play.