In general a crib includes a first and second side that each have a first perimeter support having a bottom support portion, a first breathable material retained by the perimeter support, and a lateral support member that further supports the breathable material in a position within the perimeter support and attached to the perimeter support. The crib also includes third and fourth sides, wherein the first, second, third and fourth sides define an interior. The crib further includes a mattress support platform positioned in the interior and movable between a first position proximate the lateral support member and a second, lower position proximate the bottom portion of the perimeter support. The breathable material has an air permeability of between 385 CFM to 1530 CFM and a light permeability of between 47 and 99%. In another example a crib includes first and second sides and third and fourth sides that each include a top support fixedly attached to the first and second sides and a bottom support movably attached to the first and second sides, a first breathable material retained by the top support and the bottom support and the breathable material forming a sling for retention of a mattress support platform. The mattress support platform is movable to various positions by moving the bottom support member and wherein the sling also moves such that the breathable material moves up and down to enclose the space above the mattress support platform.