The M-D Line is designed for maximum relief of sensitive areas. A pressure distribution according to medical aspects. The Maximised Dip stands for M-D Line and in combination with the high classical step shape distributes body weight on the seat bones. The 602 M-D active is suitable for trekking bikes with moderate to upright sitting position. The discharge of the perineal area is very large at 80% and usually sufficient for e.g. For example, age-related enlarged prostate. Talk to your doctor for safety. The active system is slightly tighter with the black damper unlike the ERGOLUX® series. The active movement can be adjusted via two comfort sticks. The M-D Line is therefore suitable for heavy riders thanks to the CrMo struts. If the relief of the perineal area is not so much foreground, but the comfort on the seat bones should be maximal, then we recommend the ERGOLUX® series.