TRIGON SP160UL Road Bike Carbon Fiber Seatpost Patented Ti-Spring insert Absorbs Vibration 31.6mm400mm Monocoque carbon flexible seatpost with Ti-Spring insert pantented technology. The flexible Ultra-thin Ti-insert part of the seapost is a patented design: it is made of strong and elastic Titanium alloy which could act like a spring suspension; this design helps the seatpost to absorb virbration and reduce shock when traveling on tumbling terrain, Offers more comfort for the rider over rougher terrain allowing longer, more comfortable riding. Nano Carbon- The next level of carbon material! Nano carbon is stronger,more flexible and lighter than our Venus C8 composite. The nano carbonallows our engineers to build stronger, lighter, stiffer carbon parts with ahigher strength than before. It is 27% stronger than other carbon materials.It is also more flexible and has a higher fatigue resistance. FDC - Flex Directional: Careful fiber orientation allows us to tune lateral stiffness verticalcompliance, toughness and dampening properties of the carbon HIPACT - High Pressure Solid Compaction: By using solid inner forms during the curing stage, compared to typicalair-bladder processes, we produce high-pressure compaction which means more consistent products with denser material and minimal voids 31.6mm*L400mm, weight about 200g, tested to support rider weighted up to 120kg.Monocoque carbon flexible seatpost, Offers more comfort for the rider over rougher terrain allowing longer, more comfortable riding, with 20-25mm flexible length.