A selective light absorbing semiconductor surface is disclosed. Accordingly, the subject invention encompasses diminishing or removing the undesirable characteristics of thermoset syntactic plugs while increasing the ease by which these articles may be constructed for a given use, by forming such plugs from syntactic foams containing thermoplastics. The wheel holders disposed on at least the pair of legs are bent inward in the width direction of the stroller, so that each of the wheel holders holds, at a lower part thereof, the corresponding wheel at a position inside an axis of each of the pair of legs.