The Switch Four closes easily without the seat or with the seat attached in either stroller or carriage mode. New four-wheel design with 12 ball bearings and suspension allows for a smoother ride and enhanced maneuverability. Now includes a coordinating foot muff and rain shield. The detachable cup holder and telescoping handles are two more features you will love. Travel system compatible means that our Primo Viaggio SIP 30-30 car seat (sold separately) attaches easily to the chassis for the convenience of moving baby from home to car to stroller and back home. The ultimate in convenience, Switch the seat to face forward or backward, travel system compatible and easily closes to compact fold. Features include: Reversible seat, new one hand folding, compact and self-standing once folded, can be folded with the seat in either direction, seat easily separates from chassis for even more compact stowing, side carrying handle, Primo Viaggio SIP 30-30 car seat (sold separately) easily attaches directly to the chassis, height adjustable handles with rubber insert, all wheels suspension: swiveling or locking at the front, with independent brake at the rear, built-in rear footboard provides safe ride for second passenger, large, practical basket, adult cup holder, zippered hood can be used as a sun canopy, hood with loop to dangle baby’s favorite toy, five-point safety harness, backrest reclines to several positions and leg rest is adjustable to 3 positions, boot and rain cover