We needed something cool for Arizona weather and so far the only things light enough have been Aden and Anais Muslin swaddle blankets and these Ergo lightweight swaddlers. The Ergo is the best! It helps our newborn have room to move but just enough swaddle. He can't get out of it and it is easy to get to a quick diaper change. The other swaddler blankets just frustrate him. Love this Ergo and am going to buy two more!