Customization depends on the material. A silicone sex doll gives you better options for detailed features, tattoos, and even makeup that lasts longer. TPE is harder to customize without wear and tear. Even pregnant sex dolls can be customized, but silicone is where you’ll get premium results. That’s why most reviewers rank silicone high among top rated sex dolls. It’s not just about how it feels—it’s about how it looks after months or years. Materials decide whether your doll ages gracefully or falls apart too soon.