Topper member for bed

A conditioner mat for use with a bed assembly, comprising:

• an upper layer comprising a plurality of openings;
• said upper layer being substantially fluid impermeable;
• a lower layer being substantially fluid impermeable;
• at least one interior chamber defined between the upper layer and the lower layer;
• at least one spacer material positioned within the at least one interior chamber, said at least one spacer material configured to maintain a shape of the at least one interior chamber and to help with the passage of fluids within at least a portion of the at least one interior chamber;
• an inlet in fluid communication with the least one interior chamber;
• at least one fluid module comprising a fluid transfer device;
• a conduit placing an outlet of the at least one fluid module in fluid communication with the inlet;
• wherein the at least one fluid module selectively delivers fluid to the at least one interior chamber through the conduit and the inlet;
• wherein fluid entering the at least one interior chamber through the inlet is generally distributed within said at least one interior chamber by the at least one spacer material before exiting through the plurality of openings along the upper layer;
• and
• wherein the conditioner mat is configured to releasably secure to a top of a bed assembly.