A Czech sex doll is built from multiple integrated layers designed for realism, safety, and durability. The outer silicone or TPE skin mimics human texture and temperature, while an internal framework provides structure and poseability. The skeleton often uses multiple joints—especially in the neck, shoulders, elbows, wrists, hips, knees, and ankles—to enable natural movement and stable standing. Inside, lightweight materials and foam or cushioning help give the torso a lifelike shape while reducing rigidity. Some models incorporate a hidden spine or reinforced rib system to support extended use and varied postures without warping.
A sealed interior helps manage moisture and odor, with a lining designed to resist sweat and liquids during cleaning. Heating elements can be integrated to warm skin to a comfortable temperature, contributing to realism. Hardware such as magnetic connectors or hinge pins may connect limbs to the torso, balancing flexibility with enough rigidity to hold poses. Realistic features—like a defined jawline, dental impression, and detailed breasts or genitals—are typically rendered on the outer shell with care taken to blend seams and minimize visible lines. Overall, the design blends form and function: a flexible, lifelike exterior paired with a robust internal framework that supports safe handling and long-term durability.