Adjustable Torso Height - The X40 has three height options with approximately 9 cm (3 in) of vertical adjustment. This means the same backpack can fit short or taller male or female torso heights, ensuring a custom fit for everyone. Those with taller or broader torsos can add our Booster Kit for greater range in torso fit. Core Unit Modular Camera Insert System - The X40 utilizes our DSLR Core Unit series. Core Units provide shockproof protection for Mirrorless and DSLR cameras and lenses, and ensure a user never carries more padding and weight than necessary. The X40 v2 can accommodate our Small, Medium, Large DSLR sizes. It can also accept our shallower Mirrorless series. Dual Laptop/Tablet Sleeves - Both rear and front panel padded sleeves fit a laptop up to 16 inches in size. Having two sleeves lets you pack both a tablet and laptop while providing options for various packing scenarios. Expandable Roll-Top Access - We gave the Action X series a roll-top access so the bag can