For sale is a gently-used REI Radiant 40 Women’s down sleeping bag, regular size, from roughly the 2009 model year. This is my wife’s sleeping bag and she’s used it for roughly 30 nights.

Measured weight is 1lb 11oz. For a 40° bag this is not “ultralight” – a comparable EE Revelation is a full 10oz lighter than this, for instance. But on the bright side, this is cheap!

Original specs for the bag are here:
https://www.rei.com/product/777912/rei-co-op-radiant-40-sleeping-bag-womens-regular

The short version is: this is a conventional mummy bag, with a full length zipper and draft collar. The bag is in great shape and has no noticeable damage or wear. I tried to get a few pics of loft measurements – double layer minimum is something like 3″. Single-layer minimum (difficult to measure) was around 2.5″. This is, of course, a 40° bag so it’s lightly insulated. But for warm-weather camping it should be a great bargain.