Luggage specs are scattered across 50+ sites, and "carry-on compatible" means nothing. ZipperPicker is the first true comparison engine for travel gear. Compare every major carry-on brand side-by-side with real dimensions (including wheels and handles), check airline compatibility for 100+ airlines before you buy, and track prices across retailers. Think Rtings or PCPartPicker, but for luggage. No more 40-hour research rabbit holes. No more getting gate-checked.