The Next SL seatpost is a very robust XC specific post with an easy to use and sturdy alloy head on a lightweight carbon post. Sizing comes in common 27.2, 30.9 and 31.6, and a standard 400mm length. The head of the seatpost is made from 6061 Aluminum alloy. It is CNC'd and forged to provide the optimum amount of strength for long term durability. The head has both fore/aft movement and tilt movement that can be adjusted independent of one another. Not to mention that the clamp is compatible with round alloy and carbon saddle rails. The post is constructed using a 3k carbon weave to provide the highest impact resistance and help prevent cracks from spreading. The post has a unidirectional carbon finish which complements the finish of most modern XC frames.