Fizik arione vsx kium saddlethe versus x saddle takes the level of comfort one step further for the vs range the central channel design has a more ergonomic shape with additional padding which relieves pressure even more the versus x has a maximum channel width of 30mm and depth up to 20mm for optimum pressure relief arione vsx is for the snake flexible spine if you are very spinally flexible far less than 90 degrees between your straight legs and your back when bending over as far as you