All the features you need for fun on the water. The sweet continuous rocker and center fin provide a stable platform for learning new moves. Molded side fins and huge double-barrel channels let the Matrix track on edge and explode off the wake. A great board for those just starting out in wakeboarding. 1.35" flank fin. The Device bindings feature left and right specific plates to offer a better fit for your foot. A lightweight chassis fits most feet. Device boot is also designed with flexible plastisol overlay, easy adjustable lace system, and captive thumbscrew system. Adjustable Device Boots fit adult sizes 7 - 12. Matrix 135: 53.1" x 16.8". For 100-180 lb. riders. Matrix 140: 55.1" x 16.9". For 140-230 lb. riders.