The flexible practice head is ideal for continuing to develop and train yourself on eyelash extension skills. The advantage of these flexible eyelids is that the eyelash strips are already incorporated in the eyelids. This allows you to see the hairlines well, and you can practice even better on placing at the roots and preventing stickies. The hairs of the eyelash strips are also comparable to real eyelashes, so that the eyelash extensions adhere better.