Even bigger is many times even better! SuperMAX™ gives you our largest volume cabin allowable space in almost every situation, even for US domestic flights, and is specifically developed by EPIC. for the US-market. With its SpaceBOOST™ expander closed, it maxes out at a perfect 22x16x9 inch format (55x40x23cm). With its expander fully open it goes up to a 10-inch depth (25cm), which is the maximum for even the most generous carriers. In other words, EPIC. SuperMAX™ 22” is the perfect cabin size when you SUPER SIZE!