A Prestan Manikin is a manikin which endeavours to create better CPR technique therefore the progression from the red light to the orange light indicates that the student is getting closer to the desired compression depth. The manikin is a blended polypropylene, the skin is a thermos plastic elastomer and the lung bags are polyethylene. manikins are also designed for more realism. Each of the infant manikins has a sculpted body contour and a realistic skin; this helps students prepare better for a genuine use. Prestan Manikin is very effective.