This 6" Ultimate Jack-Off Sleeve is a closed-ended masturbator, which is nice for at least two reasons: your penis will not pop out the far end, and you only have one clean up over the sink (none over your belly or lap!). The Ultimate Jack-Off Sleeve is supple, snug, and super-stretchy. It is made with special hygienically superior material. Always use a rubber compatible lubricant with this product for maximum pleasure. There are over 150 nodules lining the inside of this sleeve, like soft nubby little fingers, each one reaching out to stroke you!