Mountain Buggy's Cosmopolitan v4 stroller combines rugged all-terrain performance with urban sophistication, featuring three versatile seat modes (parent-facing, forward-facing, bassinet) that adapt from newborn through toddler years. Air-filled rear tires and puncture-proof front wheels with all-around suspension deliver a smooth ride across any surface, while the modular seat offers one of the roomiest designs on the market. Engineered for the mountains, designed for the city, this aluminum stroller folds compactly with one hand and includes premium features like adjustable handlebar, UPF50+ sun hood, and spacious gear tray. Suitable from Newborn to 48 pounds in the following modes: Rear-Facing Mode: Range Parent-Facing Mode: Range Bassinet Mode: Newborn up to 19.8 lbs or once the child is able to sit up by itself, roll over and can push itself up on its hands and knees 12" air-filled rear tires for true all-terrain performance, supported by 8" puncture-proof front tires Made with robust, super high quality aircraft grade lightweight aluminum One hand, compact stand fold for easy storage and transport One of the roomiest modular seats in the market with adjustable leg rest and 5 recline levels including lie-flat position Adjustable handlebar height for parent comfort Patented tail-free harness designed to keep long, fussy, loose straps out of little hands and mouths for superior safety and hygiene All-around suspension across both front and rear of the stroller frame, absorbing bumps for a smoother ride Convenient go/stop indicator hand brake system 2-mode front wheels to lock back for control over uneven terrain OR 360° full swivel for navigating tight spaces Excellent UPF50+ sun hood protection with extendable canopy and peek-a-boo flap for easy monitoring Great storage space with roomy gear tray featuring main tray, 2 side pockets, and 2 zip pockets Plush, reversible seat liner and detachable, gateway opening grab bar included Globally safety certified to the toughest standards