Fizik Terra Alpaca X5 Saddle Support and Riding Control When it comes to aggressive riding, you'll want ultra-durable components on your bike that can withstand the most demanding terrain. The Fizik Terra Alpaca X5 Saddle is a mountain bike saddle offering support and riding control. It comes with a smooth-edged shape that combines support and riding control for dropper post use. It also features a ride-compliant fiber-reinforced nylon shell and an S-Alloy rail. Features Mobius rail is a closed-loop design for added strength and weight distribution Co-injected elastic wing panels that flex upon impact Ride-compliant fiber-reinforced nylon shell and an S-Alloy rail Smooth-edged shape that combines support and riding control for dropper post use SPECIFICATIONSDimensions (Lx W)248 x 145mm Cover Synthetic Shell Fiber-Reinforced Nylon Padding EVARails S-Alloy, 7x7mm Intended Use Trail, All-Mountain Weight230g | Fi'zi:k | Alpaca Terra X5 Saddle | Black | 145Mm | Nylon