The Sinclair Grip is made out of Cyberskin. One of the advantages of Cyberskin is that it does not have much of an odor. The exterior is very soft with gentle raised studs along the sides. It feels great to run your hand along the exterior of the toy. The interior is lined with a series of raised rings from top to bottom, giving it a great textured feel when you are inside of it. However, as soft as it feels on the outside, it is a tight fit and creates a bit of friction. That intense friction will get you off quickly, but if you take a long time to cum, you might not like it so much after a while.
The shape is the classical cylinder. No surprises there. The Sinclair is clear though, and because it is not super thick, you get a nice view of your penis while you are using it. It is really hot to see yourself stretching the material as you go further in. Also, since it is 6" long, bigger guys will be able to "top out", allowing the head of the penis to be free of the sleeve while the shaft is fully covered. As I mentioned before, this sleeve is fairly tight, so that is a nice way to ease the friction off the head and focus it on the shaft, extending your session. It is easy to travel with and fairly discreet. Most people will not know what it is used for.
Cyberskin is extremely porous, so if multiple people will be using this, you might want to consider a condom. You can clean it thoroughly with soap and water before and after each use. You can also throw it in the dishwasher. Store it in a cool dry place away from light. Don't let it rest against other silicone products since it will degrade. Also, you can only use water based lubes with this toy. Anything else will damage the product.
This is a great sleeve. For most people, the tightness will be a plus. It will get you off fairly quickly, but if that doesn't happen by a certain point, the friction might start to get to be a bit much. The thicker you are, the more you will notice that.