The most premium sex dolls are usually made from silicone or thermoplastic elastomer known as TPE. Dolls made of either material can be very lifelike, with faces and bodies modeled on real people in some instances, with realistic skin material (similar to that used for movie special effects), and with realistic (or even real) hair. These dolls usually have an articulated PVC or metal skeleton with flexible joints that allows them to be positioned in a variety of positions for display and for sexual acts. Silicone or TPE dolls are much heavier than vinyl or latex inflatable ones (which consist mostly of air), but are roughly half the weight of a real human being of comparable size.
At the middle market price-range ($100 to approximately $1,000), dolls are made of thicker vinyl or heavy latex without welded seams or a polyurethane and silicone mixture, typically surrounding a foam core. Most have plastic mannequin-style heads and styled wigs, plastic or glass eyes, and occasionally properly moulded hands and feet. Some vinyl dolls can contain water-filled body areas such as the breasts or buttocks. Latex dolls were made in Hungary, China and France but only the French manufacturer Domax now remains in production.[citation needed]

Better Performance - Sex dolls are excellent partners to help improve your technique in bed. By masturbating with a sex doll, you are able to practice how you thrust, breathe, and pace yourself for a longer session. You can in turn use the opportunity to figure out how to best stimulate the clitoris from various angles and get the deepest penetration possible, without ever having to deal with an exhausted or annoyed human companion.
Now, TPE stands for thermoplastic elastomer, which is essentially a mixture of polyvinyl chloride and silicone. This is a type of skin that is very soft, and it mimics the feeling of human skin. TPE is way more realistic in feeling and it definitely mimics the feeling of human skin. It also is much cheaper than silicone alternatives, sometimes even hundreds of dollars cheaper. TPE also allows you to move the doll around in various ways, since it has more flexibility. TPE dolls don’t really need to be bathed, but you can, just be mindful of the water. It also is hypoallergenic as well. 
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