Used but we'll take care of. $300 OBO shipping included. Includes: storage sack, no compression. 

Lowest I done was -16F with layers and I was roasting. 

Cons: the zipper a bit of a pain sometimes. 

2lb 8z size regular...

Description

The North Face Momentum 900 is one of the lightest zero degree sleeping bags on the market. 900 fill goose down insulation, half-length construction and water/wind resistant Pertex Quantum shell fabric all add up to an ultralight bag for temperatures down to zero degrees. 900 fill eastern European goose down is the lightest, most efficient down on the market. Ripple construction evenly distributes down yet prevents it from shifting from side to side. Half-length construction reduces weight and bulk. One-hand pull cord makes hood adjustments easy and seals out the cold. Pertex 20d Quantum Ripstop provides a soft, durable and water resistant shell. Stuff sack and storage bag included. Temperature: 0F/-18C Dimensions: Circumference (shoulder): [reg] 60" (152 cm) [lng] 62" (157 cm) Circumference (hip): [reg] 58" (147 cm) [lng] 60" (152 cm) Circumference (foot): [reg] 38" (97 cm) [lng] 38" (97 cm) Max User Height: Reg: 6'0" (183 cm) Long: 6'6" (198 cm) Zipper Length: Half Fill: Premier 900 fill power down Sizes: Regular, Long Fill Weight: Reg: 1 lb 11 oz (765 g) Long: 1 lb 12 oz (806 g) Total Weight: Reg: 2 lbs 8 oz (1130 g) Long: 2 lbs 12 oz (1256 g) Stuffed Size: 8" x 17" (20 cm x 43 cm) Shell Fabric: Pertex® Quantum

Features

• Ultralight
• 900 Fill Goose Down
• Half-Length Zipper
• Highest Warmth to Weight Ratio
• Pertex Quantum Shell