Fizik designed the Arione Donna Women's Saddle for riders who wanted the pro level quality they could find in men's saddles with the anatomical design they need for comfort. It starts with the shape of the saddle accommodating your wider sit bones and uses high density foam padding to create a pressure relief channel along the length of the saddle. Foam doesn't mean the saddle is squishy. The Arione Donna is somewhere between medium and firm on the Fizik scale. Made from carbon reinforced nylon, the shell uses WingFlex technology to flex downward where inner thighs contact the saddle, creating more efficient, full range motion while pedaling. Fizik made the saddle rails from K:ium alloy, a proprietary material that has a higher strength to weight ratio than full titanium and is highly resistant to corrosion.