Sport buggy recommended minimum age new born pushchair weight 38 kg harness system 5 point safety harness padded seat belt handlebar height 101 cm folding mechanism one hand fold collapsible special feature upholstered seat number of wheels 8 max load 15 kg safety bars padded with bumper bar footrest not adjustable dimensions 46 x 81 x 101 cm dimensions folded 30 x 50 x 90 cm colour green applications city travel