Uncompromised performance through FOX s patented internal bypass technology delivers the feel of near-endless suspension travel. Exclusive internal bypass technology allows oil to flow around the piston at some points of the stroke - while creating humongous pressure at other points - supporting the vehicle like no other product can.Floating through terrain is accomplished with FOX s ride zone - combining a race-developed shock piston; internal bypass and Dual Speed Compression adjustment - allowing fine tuning for weight; terrain and speed.Dominate any terrain with the brute strength of 3-and 2.5-in. aluminum bodies; cactus cooler reservoirs and 7/8in. shafts with redundant seals; all proven in the harshest of environments under the toughest of conditions.