✔ WORRY-FREE FIT ON MOST AIRLINES (NOT FOR SOUTHWEST) Travel confidently knowing your extender is designed to fit the majority of U.S. and international commercial airlines. Clearly labeled and engineered NOT to work on Southwest Airlines, preventing the #1 compatibility complaint seen in competitor reviews.<br>✔ RELIABLE LOCKING BUCKLE THAT ACTUALLY CLICKS &amp; STAYS SECURE Unlike flimsy other extenders that don’t latch or slip loose, this one uses an **E4-Certified metal buckle** with verified compatibility on Type-A aircraft seat belts. It securely locks in place and maintains tension without sliding, stretching, or loosening mid-flight.<br>✔ ADJUSTS SMOOTHLY WITHOUT SLIPPING TO MAX LENGTH Other extenders immediately loosen to the maximum size because of weak friction adjusters. This extender features a **precision-built tensioner** that holds the exact length you set giving you steady, comfortable support from takeoff to landing.<br>✔ AVOID EMBARRASSMENT &amp; LAST-MINUTE DISAPPOINTMENTS No more hoping the airline has extenders available or discovering too late that the one you bought doesn’t work. Bring your own certified extender and buckle up privately, comfortably, and stress-free exactly when you need it.<br>✔ INCLUDES OWNER’S CARD + CARRY POUCH FOR DISCREET TRAVEL Each extender comes with a personal **Owner’s Card** for airline staff verification and a soft travel pouch to prevent tangling inside your bag. Roll, store, and go always ready for your next flight.