What is ROS MAX? \n \nWe have launched ROS MAX—a fully upgraded version of ROS, with 5 key enhancements: \n \n1. Optimized oral positioning \n \nROS MAX fine-tunes the lip height to slightly above the teeth. When the mouth is closed, the teeth are naturally hidden; when opened, the teeth are slightly revealed, and the tongue lifts gently—just like a real person breathing through an open mouth. \n \n2. Upgraded eye socket structure \n \nROS MAX features an upgraded eyelid area with an added component—the lower eyelid. This design effectively prevents facial deformation caused by jaw movement and ensures the stability and naturalness of the eye structure. \n \n3. Improved mouth-opening mechanism \n \nWith a fully upgraded jaw structure, users can now feel the support of the jawbone when pressing the chin. A gentle pull is all it takes to gracefully open the doll's mouth—refined and elegant. \n \n4. Head weight reduction \n \nIrontech Doll has been committed to weight reduction. The ROS MAX head is approximately 0.5kg lighter than ROS (about 20% reduction), now weighing around 2.5kg, making it easier for photography and interaction. \n \nIrontech Doll Silicone ROS MAX head:  S13, S14, S20, S27, S30, S31,S32 and S33 \n \n👉Click to see the difference between ROS MAX Head and ROS Head