What is Shell material?
Shell material (PC vs ABS vs polyester)
Hard polycarbonate, cheaper ABS, or soft fabric.
Short answer
'PC+ABS' blends are middle-tier — fine for occasional travel.
Shell material when buying a luggage & backpacks
Hard polycarbonate, cheaper ABS, or soft fabric.
Why it matters: Polycarbonate flexes and returns to shape; ABS cracks; soft luggage expands but is less protective.
Look for: 'PC+ABS' blends are middle-tier — fine for occasional travel.
Full Luggage & Backpacks buying guide