The Si-x type f sleeve is a pretty amazing sleeve with awesome sensations. By simply positioning the sleeve differently, you can feel totally different (and usually better) sensations than by simply using it the way it was "meant" to be used. A really great sleeve with awesome textures, but unfortunately, like almost all toys, it as its flaws.

Packaging/Storage: This toy comes in a 7 by 2 1/2 inch dark reddish box. The front shows the name of the product "Si-x (sexual intercourse-x) type F" and describes it as "fellatio like". In English, they write "Enjoy oral sex feeling. A comfortable and compact masturbator. Made from safe materials. Feel free to enjoy good pleasure. Made in Japan.", while the rest is in Japanese. In the background there is a depiction of the internal texture. The box's right side has measurements, however all writing is in Japanese. It does however state, this is a phthalate-free toy and is made by Toys Heart, and lists their site. The left side has the product name and another picture of the texture in the background, and everything else is Japanese. Finally, the back has another background texture picture from a different POV...but everything else is the same as the previous side. In the box is an open plastic bag with the toy and a free lube sample. It is best to just store the toy in the box it came in when it's not in use.

Look: The sleeve is a dark red color, and is definitely not the best looking sleeve. It is closed-ended, 6 1/2 inches long and has a circular entrance that doesn't mimic a vagina's entry or anything. Through the hole you can see a lump protruding close to the front that has a bumpy texture, which is most likely made to mimic a tongue and its taste buds. Although the less-than-sexy look of the toy might make some less attracted to the idea of using it, the feel will make you forget about that.

Feel: The type F is easy to hold, and not very heavy at all. The "tongue" on this toy is amazing and offers different sensations depending on what you do with it. If you use it normally and have it touch the bottom of the head, it's pretty good, but if you make the tongue rub against the sides and top of the head it feels better! Spinning the toy around with the tongue positioned on the head makes even better sensations! I also discovered that using lots of lube, and squeezing out the air before going in makes for a better overall experience. Towards the back, there's a ribbed area, followed by a tight area leading to the very end where there are a bunch of bumps. However, there lies the problem; between the amazing tongue and awesome tight, ribbed are, there's nothing incredible. I believe these parts spoil me, which is why the texture in the middle seems very plain. So for me it's a choice between having my head at the end or towards the front, and I avoid the middle. The sleeve is very good at warming up through your body temperature, and keeps itself warm.

Smell/Taste/Sound: There is a light odor on the toy, but nothing very foul. I didn't taste this sleeve, and from the sound of it, there is no noise coming from it while it is in use.

Material/Lube/Cleaning: Si-x type F is made of TPE, which is not extremely porous, but still is, and gets a 6/10 on safety. As far as lube goes, it can take either silicone or water-based lubes, my preference being water-based. Due to the toy being closed-ended, cleaning can be a bit of an issue, but shouldn't be very much trouble. Cleaning for this toy is to simply run water into the hole and rub your finger in until you can't feel lube or semen inside of it.

This one got a LOT of use in the beginning, now it still gets use but I've backed off of it a bit simply to not make it boring or overused. However, it is still one of my top masturbators. Strongly recommended to everyone