The standout feature is the outer ribs for an extended springy stretch: it maintains height on your sack with added padded grip in the center for a satisfying squeeze. Based on our most popular SQUEEZE ballstretcher, CORE conforms to your nuts with a smooth hourglass inner sleeve...this slick tunnel envelops your sack with a medium firm squeeze while the outer ribs keep you stretched down for true low-hangers. HOW TO WEAR: a bit of lube or spit, gym sweat, or showering works well, stretch CORE and drop your bag through, adjusting as needed; the inner hourglass shape will hold it in place. Made from our extra-soft Plus+SILICONE blend, it offers a firm grip with a smooth, velvety stretch, providing the right slippery feel for more fun. Use any OxLUBE lubes, just a drop inside, and CORE will settle onto your nutsack for extended comfort. Oxballs creates the best ballstretchers for all types of nutbags, ensuring top designs with innovative features. CORE ballstretcher has more squeeze inside, springy ridges outside for added push-down, and a thick rubbery rim that won't dig into your sack. CORE is an original design made from non-toxic, phthalate-free Plus+SILICONE. LUBE SAFE: Water-based or silicone. CARE: Wash after use in warm soapy water, air dry. Store toys separately in breathable cloth pouches or cotton socks. MEASUREMENTS/WEIGHTS Length: 2in/5 cm Width: 2in/5 cm Depth: 1.75in/5 cm Outer circumference: 7in/18 cm Inside diameter: 1in-1.2in/3-4 cm Outside diameter: 2in/5 cm Product Weight: 2 oz