Hardside luggage features stiff, molded construction in polycarbonate shells and creates the flexibility and strength needed for any type of travel. A piece of hardside luggage can withstand the toughest travel conditions without any increase in the chance of damaging the bag. Hardside luggage is surprisingly lightweight, and available in many sizes and colors. Many hardside suitcases are now expandable as well, offering the traveler flexibility in packing.