GERMAN POLYCARBONATE: Assembly Stark is crafted with resilient German polycarbonate, a timeless hard shell trolley bag crafted for impact resistance and long-haul durability.- ENHANCED SECURITY: Built-in TSA-approved combination lock and anti-theft double zipper pulls secure your belongings at check-in, boarding, and every airport in between.- PACKING CAPACITY: The Stark hard luggage 20-inch cabin suitcase packs 23 days of essentials , the unbreakable, timeless hard shell for the traveller who wants luggage built to last, not just last a season.- WARRANTY: 3-Year Stress-Free Warranty Against Manufacturing Defects. We're there for your journeys.