- soft silicone heads have a 12cm-deep oral cavity (while regular silicone heads have no oral cavity)
- as we write there're 3 heads available as ROS (with more detailed oral cavity and movable jaw). They are: Ayami, Umi and Yuma. You'll be able to select the ROS option for these heads when you choose the 'soft silicone' head option.
Softness video test with head Umi:
Softness video test with head Yuma: