This infant stroller is made by aircraft aluminium alloy frame which is lightweight and durable than common iron frame.Anti-shock interal springs in front wheels provide shock absorption when pushing on rockyroad or step way. This all terrain newborn carriage with all of the advanced safety design passed the American ASTM F833 safety standard test and CPSC (US Consumer Product Safety Commission) Certificate. baby stroller protect your baby to grow up surround with safetycomfortablelove for every families.