The durability, realism, and safety of sex dolls heavily depend on the materials used during manufacturing. The most prevalent material is silicone, prized for its highly realistic feel, flexibility, and ease of cleaning. Silicone-based dolls provide a soft, lifelike texture that closely mimics human skin, making them a popular choice among consumers. Another widely used material is thermoplastic elastomer (TPE), which is softer and more flexible than silicone, allowing for more natural movement and a more pliable feel. TPE is also generally more affordable, making it accessible to a broader market. Both silicone and TPE are non-porous, which helps in maintaining hygiene and preventing bacterial growth when properly cared for. Some manufacturers also incorporate internal frameworks made from metal or high-strength plastics to provide structural support and stability. Additionally, certain parts of the dolls, such as joints or facial features, may utilize specialized composites to enhance realism and durability. Overall, the choice of materials is crucial in delivering a realistic experience while ensuring safety and longevity of the product.