void open space for high u201c breath ability u201d of the foam the available pore sizes range from 3 to 110 pores per linear inch a bumper one inch to two inches thick with a pore size of 20 e g will provide the infant with significant protection against physical injury when falling while allowing gases to move freely through the foam an effective crib system e g may be one in which the infant 39 s clothing has sufficient thermal capacity for comfort with no bedding except the open weave fitted sheet covering the sleeping pad with holes in combination with a one piece reticulated foam bumper height 9 inches covering the interior perimeter of the crib compared to conventional crib systems this system 1 effectively removes carbon dioxide continuously 2 provides oxygen through pad holes when infant is in prone and all other positions 3 increases ventilation to stimulate breathing and reduce the risk of overheating and 4 removes through holes nasal and regurgitated material which may interfere with breathing turning now to fig1 an alternative embodiment of bumper pad 46 is shown whereby the passageways are configured as longitudinal slots 60 extending parallel to the longitudinal axis of the bumper pad 46 it is within the scope of the present invention to variously arrange the slots along the length of the pad 46 for example slots can be provided along the bottom surface of the pad where it rests against the cushion or pad 2 to passively blow away carbon dioxide accumulating on the.