BUY NOWLF RETAILERS The TREK 4D binding is what we consider the flagship binding of our new 4D system because it is equipped with the best of what the 4D has to offer. In addition to having the ultimate in board to binding response, the TREK 4D is our most versatile binding on and off the water as it comes equipped with our NEW Reflex Walk Liner! The removable and durable Trek Liner Bottom featuring articulated grooves provides comfortable walking and solid traction on all types of terrain. An adjustable Velcro strap opens and closes the upper back area of the binding, allowing the Reflex Walk Liner to be removed when wanted and held in place when needed. A built in “Shoe Horn” allows the Reflex Walk Liner to be removed and inserted into the binding with ease. The TREK 4D was designed to be the binding choice of Nico von Lerchenfeld and park riders around the world!