I have a Mammut Down Sleeping Bag for sale. It is rated for 20°F to 30°F. Super comfy, cozy, and light. It comes with a compression stuff sack and a large cotton storage sack. Retail is $399.99 I am selling mine for $200.

700 fill down

Fill weight: 450g

Total weight: ~1020g

Size: Long (I am 6'2" and it fits me great)

Here are all the details on the Mammut website: https://www.mammut.com/us/en/products/2410-02570/perform-down-bag-7c