The materials used in advanced sex dolls are carefully selected to maximize realism, durability, and safety. The most common material is medical-grade silicone, which provides a soft, skin-like texture that closely mimics human tissue. Silicone is non-porous, hypoallergenic, and easy to clean, making it an ideal choice for intimate products. Thermoplastic elastomers (TPE) are another popular material, offering a more elastic and softer feel compared to silicone. TPE is also flexible, allowing for more natural movement and compression, but it requires more diligent cleaning to prevent bacterial buildup. Internal frameworks are typically constructed from metal or high-strength plastics, providing stability and poseability. Some advanced dolls incorporate layered materials, combining silicone or TPE with internal skeletons or pneumatic systems to enable realistic movements and responses. The outer surface may include detailed features like realistic veins, pores, and skin textures to enhance tactile authenticity. Additionally, some dolls feature embedded sensors or heating elements to simulate body temperature or responses, further increasing realism. Understanding these materials helps users appreciate the craftsmanship and technological innovation involved in creating these lifelike companions. As material sciences progress, future designs are likely to become even more realistic, durable, and safe for users.