My summer bag is a REI travel down, but it seems to be an old design, they have since changed it. REI Travel Down Sleeping Bag - Free Shipping at REI.com Its $140, twenty more than I paid for mine just last year, but looks substantially different. It may be a bit heavier than mine as well. At a stuffed size of about six by twelve, its probably more substantial than my old one, that I can get smaller than that. Its under two pounds, and not super expensive. Check it out when at the rei. I like that it unzips fully, like a quilt. Usually I carry a light silk liner as well, to keep my bag clean, or to use when its really hot. I think that big agnes makes some non insulated inflatables, but I am not a fan of the brand as all my aircores have lost air overnight, even when new, but they are very comfortable.