YD142 Full Carbon Fiber MTB Road Mountain Bicycle Cycling Saddle Seat Cushion Black Comfortable and supper lightweight, the YD145 3K Glossy Full Carbon Fiber Hollow Bicycle Saddle Seat offers a great option for road bikes or mountain bikes (MTB). It features a unique, ergonomic hollow design made with shock-absorbing technology. Smooth curves mold to your body and provide a good support. And it is built with a scale on the bottom frame for easy installation. Crafted from high-grade carbon fiber, it is tough and durable for long-lasting use.