Blend of Polycarbonate and ABS mixed into the shell makes the xcase-XL extremely durable. Polycarbonate allows the shell to absorb impact by 'flexing' when under heavy stress. ABS is then added to give the shell greater rigidity so that it will not permanently deform when under pressure but instead 'pop' back up into its original shape. Also includes Push Button Mono Handle System and Chrome plated wheels.
