Combi pushchair wipe clean lightweight recommended minimum age new born pushchair weight 108 kg backrest multiple harness system 5 point safety harness series obaby chase 3 wheeler wheel settings swivelling lockable number of wheels 3 max load 15 kg footrest adjustable dimensions 96 102 x 62 x 89 cm dimensions folded 52 x 61 x 87 cm included in delivery canopy rain cover shopping bag