Manufacturer‘s Description:

"[M]ade from an airy 3D mesh that efficiently carries away heat and moisture. It is soft and flexible and shapes itself gently to the baby's body."

"The Baby Bjorn Air Carrier is really a wonder to watch in action. Put an infant in it and watch all the fussing and crying just melt away. Usually, it's one of the best ways to put them right to sleep. Baby Bjorn's Air Carrier is made from a light mesh, specially designed to keep kids—and you—cool during warm or moderate weather. If you're a warm person or the mercury is just starting to rise, the heat that you and your baby share can sometimes get a little too much. This can be a problem sometimes with models like the Baby Bjorn Original Carrier and its denser poly-nylon. However, the fabric on the Air Carrier is much more breathable. When you're interested in Baby Bjorn but just can't decide, all you need to know about the differences between the Air Carrier and others is: the Air Carrier keeps you cooler than other models; meant for summer and moderate weather; it is meant for relatively short-term use, unlike the Baby Bjorn Active Carrier, which is meant for extended use."