<p>A bed covering (10) which includes an air permeable section (13) that can be selectively covered by a cover section (20). The cover section (20) can be rolled up (in whole or in part) to allow ventilation to take place through the air permeable section (13). The cover section (20) forms a warmth retention section. This section (20) and another warmth retention section (19) can be a blanket, duvet or similar. A flap section (14) can be included to tuck under a mattress.</p>
