From Nuna, this adapter features: Meet the stroller frame that redefines mobility for modern parents. Designed to fit any PIPA series car seat, the SWIV & TRIV bassinet, and the Flex system stroller seat, it’s built with carbon fiber reinforced aluminum for unmatched strength and featherlight handling. The one-hand fold? Smooth and intuitive. The carry? Effortless. And the look? Sleek, minimal, and engineered for everyday elegance. This Flex system stroller frame offers a more intuitive way to move through every stage, from first newborn outings to spirited toddler adventures. Features: Folds easily with 1 hand and stands on its own when folded Folds with ring adapter attached Ultra-lightweight at only 11.3 lbs. with adapter attached and easy to tote with carry strap when folded Travel system ready–compatible with any PIPA series car seat using the included folding ring adapter, the SWIV™ and TRIV™ series bassinet, and the Flex system stroller seat Quick-engaging 1-touch rear-wheel braking system provides scuff-free security All-wheel suspension and large puncture-proof tires are ready for any terrain Carbon fiber reinforced aluminum frame offers unparalleled strength and durability while maintaining a remarkably lightweight profile Carbon fiber’s unique weave pattern on the frame creates a visually striking effect with a modern aesthetic Large basket holds everything you need for the journey up to 22 lbs. Tracking device pocket in the basket keeps tabs on it wherever you go Height-adjustable 3-position pivoting handle for comfortable strolling, no matter your height Luxe leatherette accented pushbar and armbar add style to your strolls Go hands-free and store the frame away during travel with the included carry bag Recommended use: Up to 50 lbs. Frame Weight: 8.5 lbs. Frame + Adapter Weight: 11.3 lbs. Stroller dimensions (open): L 37 x W 21.5 x H 43.5 in Stroller dimensions (folded): L 23 x W 21.5 x H 29.3 in Imported.