An ideal saddle for medium and short distance riding where a frequent change in position is necessary. The flat shape in conjunction with the rigid saddle shell give a very direct ride feeling.The flat shape is most suited for cyclists with good lumber flexibility and allows easy movement of seating position, making it ideal for experienced riders that like to change position to really put the power down.The PAS system is a channel in the base of the saddle. The hole or channel helps to maximises blood flow and supports the pelvic area while also preventing pressure peaks. This system is designed and developed to eliminate pressure and numbness to areas that need it most.The Zero saddle uses Prologo's ESD technology. Ergonomic Shape Design is where Prologo have identified a new ergonomic design for the centre of the saddle, which allows more space for your legs and an overall better cycling position. Further to this, the ESD reduces the friction of the quadriceps against the body of the saddle.**Specs*** Size: 278x141mm* Rail: Tirox Aluminium 7mm* Cover: Microfibre* Padding: Light Foam* Weight: 215g