Because softshell luggage has more give, a hard shell suitcase can be better at protecting fragile contents, assuming you cushion it well inside. On the other hand, that rigid exterior makes hardshell bags unable to be compressed to squeeze into tight spaces like softsided bags are more apt to allow.

Hard shell suitcases are superior for protecting fragile items and providing security. Modern shells are made from polycarbonate or aluminum, which are extremely lightweight yet "flex" under pressure without cracking. Unlike soft-sided luggage, a hard shell cannot be easily slashed with a knife by a thief, and most come with integrated TSA-approved locks that secure the zippers directly into the frame. Furthermore, they are highly water-resistant; if your bag is left on a rainy tarmac, your clothes inside will stay dry, whereas fabric bags tend to soak up moisture. They also maintain their shape regardless of how empty or full they are, which prevents your belongings from being crushed when other heavy bags are stacked on top of yours in the plane's cargo hold. They are also much easier to clean with a simple damp cloth.