For their larger check-in size, Arlo Skye is swapping out the aluminum-magnesium construction of their carry-on for a micro-texturized polycarbonate shell with aluminum-magnesium caps on the corners for additional protection. This is better suited to inclement weather situations and rough baggage handlers. 

They've also bumped up the size of the wheels to a 60mm diameter for better stability and travel as you get through the airport. Other details include 66L of storage space, front and rear grooves for strength, and an interior compression system with antimicrobial lining. 

$395, arloskye.com