Sport buggy recommended minimum age new born pushchair weight 68 kg reversible seat frame material aluminium backrest 4 positions canopy xl canopy harness system 5 point safety harness padded seat belt folding mechanism one hand fold self standing special feature washable cushion wheel settings swivelling lockable wheel type eva tyres number of wheels 4 safety bars swivelling padded footrest 2 way adjustable dimensions 88 x 46 x 94 cm dimension